Malicious PDF — malware analysis report

Static analysis result for SHA-256 15011114a7298b4e…

MALICIOUS

PDF

37.9 KB Created: 2020-08-02 10:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3b022a057df72fa3ba6ca569420e06b SHA-1: 81d09edeec28a73015050c292cf6f5d455b8afef SHA-256: 15011114a7298b4e1707ed2c475cc1095b00007dece6eebf2af94c20ba762812
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure related to song lyrics, likely intended to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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=flatline+justin+bieber+lyrics
    • http://files.johnashcroftandcompany.com/uploads/1/3/0/9/130969368/zamilusi.pdf
    • http://files.18q-adifferentkindofnormal.com/uploads/1/3/1/0/131069859/ae1821cda3.pdf
    • http://files.theparksphysie.com/uploads/1/3/0/7/130775623/d46e9bc8.pdf
    • http://files.gchla4h.com/uploads/1/3/0/9/130969983/valimu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/desarazofem.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/72037351881.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4339/files/26690185732.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/minuwuzelit.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/xovulitikibavowarumekal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/41842110523.pdf
    • https://cdn.shopify.com/s/files/1/0429/0173/3542/files/stihl_ms_250_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/53365051252.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/pizodedoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5307/9963/files/teronuvoxuxebam.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/88948522732.pdf
    • https://cdn.shopify.com/s/files/1/0436/8164/4697/files/36447729634.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/degutupolimitalonopakof.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_off00005843.bin
114e83677dbc9067a839255d631d6ac0c7bc6f949aaf2ded8e8a9e917e0f7df2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5843 5068 bytes
font_01_sfnt_off00006998.bin
ad1ab3d864d0a255122bdccb0cf2162696959cd22028561d47a44d68b598e238
pdf-font-stream PDF embedded font (sfnt) at offset 0x6998 9708 bytes