Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c3a661e1067516…

MALICIOUS

PDF

40.2 KB Created: 2020-08-03 19:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 075b0d07542220768773f3905653432d SHA-1: d4d317324856d2a7368bfd5753bd20dbe01cd0ca SHA-256: 17c3a661e1067516c01955e6d06f8cd876270dc8fcf9746fb86747c7d0beffc4
174 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links redirects to a known malicious redirector, indicating a phishing or malware distribution attempt. The presence of callback lure heuristics further supports a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.cc/pify?keyword=sources+of+statistical+data+pdf
    • http://files.leapinghound.com/uploads/1/3/1/6/131606280/zodafamikowem.pdf
    • http://files.sertoma-gunshow.com/uploads/1/3/0/7/130775623/97cde3.pdf
    • http://files.thesparklingfox.com/uploads/1/3/2/6/132680813/1d843c235a0.pdf
    • http://files.paxchristisa.org/uploads/1/3/2/6/132681558/9597129.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/chuck_mangione_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/tejut.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/vuzun.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/nebizezokupepiwigik.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/xelebet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/fizugexesadusexaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/pejemamotaxivubem.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/30130324074.pdf
    • https://cdn.shopify.com/s/files/1/0432/6260/7520/files/lubigorov.pdf
    • https://cdn.shopify.com/s/files/1/0434/4505/9749/files/22011879852.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/jeberokanalafixijiwamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/94248847521.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_off00005e3a.bin
eaf756f27311d48350bb2380084e3a994af9377f72ad2799a67536c2ffcdf62f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3A 5252 bytes
font_01_sfnt_off00007028.bin
0675bf08aaf4cee9991454f85e3dcf6ecd64d5f2dc883fd4e6049a6d2c877753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7028 10456 bytes

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