Malicious PDF — malware analysis report

Static analysis result for SHA-256 763518d25bd8ca77…

MALICIOUS

PDF

44.7 KB Created: 2020-10-26 12:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 591fbdda53d0e25e1d3c748a949cb0cf SHA-1: e8763bb2d1331f71b61c5f2fa6388fb0c04048d4 SHA-256: 763518d25bd8ca7713e1050618d49a1e3dc4f158f4d7959f676fe7c8a4e525ec
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text fragments and URLs that suggest a lure related to deactivating a Google account. The presence of multiple links on disposable hosting further supports a malicious intent, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/123?keyword=deactivate+google+account+android+phone In PDF document text
    • https://sinepakeje.weebly.com/uploads/1/3/4/4/134490574/1bb7835f07.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/5463055.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/waves-suzomukoxi.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/situb_somexilotewinef_wununadi.pdfIn PDF document text
    • https://buxijoxusezo.weebly.com/uploads/1/3/1/4/131483018/satobupe_simutawapadoju_fuvimutef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5f8de0009c571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_5f8db712ec3ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f93d029ab2cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5f8f07fe73c4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_5f8eaadac690e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/76396666-aff6-4b20-86b9-4c1b9d24be0f/gitulajogotepevadekajeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8269a5b8-59d1-4227-a024-92ebedcc0ea0/zuviwudiluvupokafesuliduj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a49fcdf-0b7c-4a3c-ba2b-0b4909193c9b/10629384994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aed168ed-7759-4f43-991c-5158ecd4a7f1/95407402424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/dimetuxuwawavefigaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5172/7030/files/potion_bar_game_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8814/3038/files/farmer_in_the_dell_cooperstown_pa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7025/5004/files/kejamagijogonaguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505a434a-de7e-45f5-97f5-0869cce7a551/sedavaziwetusuvumumusarez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a81607-5709-4b9b-983f-ff27f526d8c2/zilowaxuvoxin.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/37266870435.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/20499670401.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/challenging_algebra_word_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/ribikitinesuduxujubidaba.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/86503010441.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDA 5216 bytes
SHA-256: 8493ff1e8e6ae2512a20ca0d5abaf42a7baa3b73a5dbe3e34dab5ec637b39d3a
font_01_sfnt_off00008194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8194 10400 bytes
SHA-256: 677e72817113660baa9c570e27b6fcf3488176ee3dfb579c5af584c6a71dbc7e

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