Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dddbdc2f33d80c7…

MALICIOUS

PDF

71.8 KB Created: 2020-12-26 16:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dd74e007ab5016f471cf78b4802f0775 SHA-1: e9f3269a8c12407abe888a889177461523b45876 SHA-256: 3dddbdc2f33d80c7e42b6e7c9ea3a403b97e1eb7ffbe0960610a17bddb9084f9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various platforms, suggesting a link farm or SEO poisoning attempt. The primary URL, 'https://trafffi.ru/123?utm_term=yogi+green+tea+kombucha+decaf', is likely a lure to a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=yogi+green+tea+kombucha+decaf PDF link annotation
    • https://wekasekizoturir.weebly.com/uploads/1/3/4/1/134131482/dotinerot_xoxemuwo_jikufax.pdfIn PDF document text
    • https://turexebino.weebly.com/uploads/1/3/4/2/134265835/javiparobefo_jafelenej.pdfIn PDF document text
    • https://mojeleku.weebly.com/uploads/1/3/4/8/134862936/wesadajowimurureme.pdfIn PDF document text
    • https://cdn.sqhk.co/mebinolopuf/WXWjeAQ/bloop_go_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446500/normal_5fb8bf080e020.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/4875903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f959a1e6bbd6.pdfIn PDF document text
    • https://vitukotegow.weebly.com/uploads/1/3/0/7/130775282/xirejerofirazama.pdfIn PDF document text
    • https://pakoverixofe.weebly.com/uploads/1/3/4/7/134771358/19e6be4b66f7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zirojopemup/70880134346.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/cod_bo4_zombies_ix_easter_egg_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/journal_of_gerontological_social_work_author_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/cleveland_county_register_of_deeds_oklahoma.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/bnz_kiwisaver_hardship_withdrawal_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 5272 bytes
SHA-256: b553e8aa981a9750845aa6c9d96f2949c021541bbbb832da5ccb2fa1ab7b7645
font_01_sfnt_off0000dc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC32 11528 bytes
SHA-256: f8c46253482249b9c4a4e929b190b971a9309241b135c9e0bc0e5175e2aeb664
font_02_sfnt_off000102d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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