Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5baf715d3a2e92…

MALICIOUS

PDF

41.9 KB Created: 2020-10-25 21:28:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b005c9a13a3f97b683885cc9109e8ddc SHA-1: a8805fc5fe44ae3569e54de3b42226994b48abf2 SHA-256: ab5baf715d3a2e929e966bca7878227f311243d5f73c568d6109488ec6eae860
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.link'. The document body, though heavily obfuscated, contains a reference to this same URL, suggesting it's the primary lure. While the document itself doesn't contain executable scripts, the presence of embedded links and the ML classifier's high confidence indicate a malicious intent, likely to redirect users to a phishing or malware-hosting site.

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.link/pify?keyword=flat+tow+vehicles+dinghy+guide In PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/1145be3e.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/xomoripaxero.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/e62078.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6245/5191/files/counting_atoms_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3826/8318/files/catch_your_sun_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7408/5798/files/playhouse_disney_website_2006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9574/7488/files/dragon_village_m_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/why_does_slim_understand_why_george_killed_lennie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7758/0997/files/anime_themes_for_android_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/lekefuxetupedin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/classification_biology_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6112/0676/files/arithmetic_right_shift_in_verilog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4458/7688/files/namisev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/alcaloides_del_cornezuelo_de_centeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0472/2914/1157/files/second_act_rating_parents_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5642/5879/files/nccn_guidelines_head_and_neck_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8940/5120/files/escambia_county_clerk_of_court_traffic.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_off0000669f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669F 5316 bytes
SHA-256: 8d14bd049e69db86b8fe260361800d97720ddc902a7e1425f210ce8a9d311b5f
font_01_sfnt_off000078cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78CB 9856 bytes
SHA-256: 1d6b43c5b497fc9c3b9c526b2a74db81a22197dd6ff79b97e21fb0c8c44c2390

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