Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35fd2ca0818326e…

MALICIOUS

PDF

46.5 KB Created: 2020-10-23 21:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 043c4db0d7bd2763fe00f49a11ed8321 SHA-1: 4a0e3d15267bca15ae30aae983aec47d5adcbebb SHA-256: e35fd2ca0818326ee957752bacb4f287ddc916fb98b519fc932e52ee5dbae3ea
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to lure the user to a malicious site. The presence of numerous other links, many pointing to Shopify, indicates a link farm strategy to potentially obscure the malicious destination or for SEO manipulation. No scripts were extracted, but the primary threat is the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.
  • 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.com/123?keyword=security+analysis+pdf+espa%25C3%25B1ol In PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/jafejufaren.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/6f3fe19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f8884dd4e2fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5f8f333819b1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5f920c78559fe.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://cdn.shopify.com/s/files/1/0431/6656/4520/files/turma_da_monica_em_espanhol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/hathorn_boots_oxford.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1049/0022/files/26341683781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2971/6374/files/my_pony_lyrics_daniel_wesley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/xunileji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f79192-e536-42d9-8a58-53a96258ec42/destined_for_war_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d89303-5fa5-4759-86d2-ebc677f1d689/vermintide_2_new_weapons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c6e665-263f-41a5-8724-b57d715a257f/63163054246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4884efd-def4-4701-9f20-50ee40f20d92/the_intelligent_investor_first_editi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/4501665186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8314/4599/files/indeks_glikemik_jagung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2412/9437/files/wapking_marjaavaan_ringtone_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/4th_grade_multiplying_and_dividing_decimals_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2205/6096/files/zebemupivizonipezisorawen.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_off0000694d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694D 5448 bytes
SHA-256: 90c28bdc382773661a8585812f8dfe16937f802a2580d8cc72a772fddf312c06
font_01_sfnt_off00007b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9D 9660 bytes
SHA-256: 7d6f3a9963a3a13f56a9701feeb0834cefcc1aff8b6b673dc886a92c43c3076f
font_02_sfnt_off00009ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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