Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d5be1baedbf06a…

MALICIOUS

PDF

49.2 KB Created: 2020-08-26 19:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e9e77cf2cb39d52964fdebf32e6374b SHA-1: cc88044e8184c5bab213ca64142c65f555a43083 SHA-256: 78d5be1baedbf06a78c60c025c2fdc23fe1c0dedf97e5f4d2778afd62d2c3f18
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic firing for a malicious redirector. The embedded URL 'https://ttraff.cc/pify?keyword=poynter+institute+bias' is directly linked to malicious redirector infrastructure. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to trick users into clicking it. 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.cc/pify?keyword=poynter+institute+bias
    • http://files.eatmysugar.com/uploads/1/3/2/6/132695213/61c7d.pdf
    • http://files.nunavutlearning.com/uploads/1/3/1/4/131406592/8ce8010a9.pdf
    • http://files.masjid-al-rasool.com/uploads/1/3/2/6/132682820/jukasinuludamu.pdf
    • http://sujid.gotchadesigns18.com/uploads/1/3/1/4/131483492/7491665.pdf
    • http://files.stonerstakeover.com/uploads/1/3/1/3/131379530/fafuko_jifatigefoxa_sarabopaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/lexique_assurance_maladie.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/shin-_chan_game_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/dedewiror.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/75952437400.pdf
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/23935351318.pdf
    • https://cdn.shopify.com/s/files/1/0440/8419/9574/files/fogekifaseridetig.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/fundamental_financial_accounting_concepts.pdf
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/10474026754.pdf
    • https://cdn.shopify.com/s/files/1/0433/2657/0664/files/60194439212.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/wujijitigazitibukake.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_off000082f5.bin
de565973c094a444928617957bcf3d5cb3785e4da2e2290d2e3bb3e9c4af5820
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F5 4888 bytes
font_01_sfnt_off000093a0.bin
b07112b53df82ca42da58f900b1abee4d8908a5d3692dc56b022c147595db125
pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 10792 bytes