Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d04129a57b9087…

MALICIOUS

PDF

41.1 KB Created: 2020-08-03 15:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cad5616ed450720b0ff505c141bf55a2 SHA-1: 356a2fd94f06b73649eac90793aef150ca41263a SHA-256: 04d04129a57b908734f05d0492de0b8375391499e05209c832fb523e05613227
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to what appears to be a link farm designed to distribute other PDFs. One prominent URL, https://ttraff.ru/pify?keyword=the+fifth+wave+pdf+free, is flagged as malicious, indicating a redirection to harmful content. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a malicious distribution scheme.

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.ru/pify?keyword=the+fifth+wave+pdf+free
    • http://files.johnallecompany.com/uploads/1/3/0/7/130740180/tawigedegujupap.pdf
    • http://files.cascadiannomads.com/uploads/1/3/2/7/132740865/naxajibebudebazu.pdf
    • http://files.noshellsstageplay.com/uploads/1/3/0/7/130776022/monobupulepaz.pdf
    • http://files.qigongnyc.com/uploads/1/3/0/7/130739369/safimotidudezum_tupoxut_xavibe_piluxuroj.pdf
    • http://files.armstrongresponds.com/uploads/1/3/0/7/130740062/powolato.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/81524810863.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/kupomizebufozase.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/9974129691.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/59038232849.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/ffxv_chocobo_breeding.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6888/files/nazelusibuvebadi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/36014779873.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/98170676530.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/authorize_net_test_credit_card_number.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/92304375099.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53978683100.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006241.bin
6cc5f20e48bbef449170e2cb84a06fd911278d5c65301eb905cb7b2f06820fae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6241 5020 bytes
font_01_sfnt_off00007368.bin
475ec29c3ca3e4f7d5f85f7dfc7dffe9404d8909d200d0bf008231bfcec76286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7368 10692 bytes

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