Malicious PDF — malware analysis report

Static analysis result for SHA-256 084b88fdaee779fa…

MALICIOUS

PDF

84.3 KB Created: 2020-09-10 03:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7348a8091f5c8f9574d16c7894fbf056 SHA-1: 2d6d9bd3ddc71d6a552144f905c0a5419c8bb3b5 SHA-256: 084b88fdaee779fa464bcda85516bc363935f12b9dc7f2262aa2fd16f98595f2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'free common law separation agreement template' and a URL that mirrors this theme, suggesting a phishing or scam lure. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic to potentially harmful sites.

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.me/wix?keyword=free+common+law+separation+agreement+ontario+template
    • http://jepiveni.flfifedrum.com/uploads/1/3/1/0/131071157/72d180e6564c31.pdf
    • http://files.austinhighvolleyball.com/uploads/1/3/1/8/131871979/zimadomig-wupipenabadazex.pdf
    • http://fejomiro.domesticfabrics.com/uploads/1/3/0/7/130739723/7570517f.pdf
    • http://jenimu.saxonquill.com/uploads/1/3/1/3/131378816/nonixibuwi.pdf
    • http://files.amberpipskycounselling.com/uploads/1/3/0/8/130813860/noramutapafef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5de1df_4036f59045034baca61f59de436ad812.pdf
    • https://static.usrfiles.com/ugd/b8c837_b071211d68af4c7f8a6fe794621ad5f3.pdf
    • https://static.usrfiles.com/ugd/912de2_c46d1f447c804ed38a3a602eef8542c4.pdf
    • https://static.usrfiles.com/ugd/e745be_7b3bff73a2f04001b0e0c7f6bb93057d.pdf
    • https://static.usrfiles.com/ugd/d4579c_a4a6dc52cc224a018302e298a331f3cb.pdf
    • https://static.usrfiles.com/ugd/7a13df_8972a72c33cb45dbabd008dfb98df41a.pdf
    • https://static.usrfiles.com/ugd/d7d6cd_321e8b13c40443d0bea19fee76689ac5.pdf
    • https://static.usrfiles.com/ugd/73cb9e_1a35823814c64cebae74c60cb0e65dfd.pdf
    • https://static.usrfiles.com/ugd/35e1ce_dde92dde6ff84051add42d6c70fe5e2d.pdf
    • https://static.usrfiles.com/ugd/a107db_7c21d3fc5be34804bd2ea7aa29657c5a.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_off00010c67.bin
a1a2ef3e3c78ee1903d8715baa35dab464f3cf3712fa609039015f52f72276e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C67 5300 bytes
font_01_sfnt_off00011e70.bin
92dfb24cf120b6351682ad3c3f60ca84b5924b01f06e9642325c72701e66d856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E70 10772 bytes

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