Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1468ce91eab8621…

MALICIOUS

PDF

41.5 KB Created: 2020-08-11 16:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dab6e89e97c57286a65837bcd7b8ee3e SHA-1: 7404caa1a1320ed9f8a4006d83cfee9cbeca16ce SHA-256: c1468ce91eab862100dd68421bdfaf6b6c55d194e2e298014873271941e8f0b3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it's a redirector link to traff.com. Additionally, it features a large link farm pointing to various shopify URLs, with one identified as a malicious redirector. The document body contains obfuscated text and a URL that appears to be part of the malicious infrastructure.

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/pify?keyword=braving+brene+brown+pdf
    • http://sajaruxur.centralflhomeeducationservices.com/uploads/1/3/2/6/132681670/4012794.pdf
    • http://files.kieranekeledo.com/uploads/1/3/0/9/130969614/sutujuresa-buvoj-tazebuzefa.pdf
    • http://files.compassion-for-kids.org/uploads/1/3/1/4/131438835/fajazotebu-vetuxi.pdf
    • http://files.bluesandbeer.org/uploads/1/3/1/3/131380438/e86d29ea.pdf
    • http://files.akhalteke.cc/uploads/1/3/2/6/132681812/tabokifezafolimegovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5498/9466/files/is_sam_smith_married.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/79540845543.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/defovewamivumigapu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/45873610070.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0336/files/mujemazerumuzis.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/49641771925.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/gupisimutikuwid.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/84740522806.pdf
    • https://cdn.shopify.com/s/files/1/0435/7000/4126/files/egyptian_arabic_grammar_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/advanced_transport_phenomena_ramachandran.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/jspdf_plugin_autotable.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ed.bin
d767b819750d2ca449afecf6c554c94e93371913ef4ba208c89aee0a79d3df85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63ED 5340 bytes
font_01_sfnt_off00007637.bin
2b68dfe3ba95cfd989c8b38a9c90d3b50467af319b6b9645491e910cb5d19abd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7637 10312 bytes

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