Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbda53e0c49fb70…

MALICIOUS

PDF

45.5 KB Created: 2020-09-01 17:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99d58c2d8360efcdf2abcd8d640ec405 SHA-1: 5c775d6becf12413cf69f56bc7fb2acb5917e91d SHA-256: 0bbda53e0c49fb70d7fd1e29332e91cc5409a15e1b95ae5097c93ac29cc08e72
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is disguised as a legitimate document. The document body, though heavily obfuscated, appears to contain text related to an 'Iowa llc operating agreement template', suggesting a social engineering lure. The presence of numerous external PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy, likely to improve SEO for malicious content or to distribute further payloads.

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.com/wix?keyword=iowa+llc+operating+agreement+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/de3d83_168da6afa7a04502bf14df39cb589fc8.pdf
    • https://static.usrfiles.com/ugd/77941b_c787b31840874ec28772355e2195756b.pdf
    • https://static.usrfiles.com/ugd/b8c837_571338f8de2840c8824c13cd15b6d5be.pdf
    • https://static.usrfiles.com/ugd/b8c837_67710c0cfd694f7d96f786230b9ed7a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_208b6b9e66bc4a1ba5edfd7a15364afd.pdf
    • https://static.usrfiles.com/ugd/e1c37d_06460e6ded244de7a120f14e66a38af3.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a03222cadb146c1a43d296296f3e47a.pdf
    • https://static.usrfiles.com/ugd/a59130_2f0ce83217db46818233a991f7b6ad6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_af64b28627cd4bec8224d9ecbae77549.pdf
    • https://static.usrfiles.com/ugd/565485_c1c2789c356043ef97e0a05410ea9304.pdf
    • https://static.usrfiles.com/ugd/d5cf39_c320bc5f8ba3429b977d02a01329a8d2.pdf
    • https://static.usrfiles.com/ugd/accd1f_91cfb835cc7c4a0e96d054522fb27126.pdf
    • https://static.usrfiles.com/ugd/79cb75_6f39e43fa2c7481796ad32a7635d2537.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006719.bin
9a3b7f20a07bad1cf43b09a9f675ac58916a37b0e1c34252484c08497e17c37a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6719 4892 bytes
font_01_sfnt_off000077ae.bin
9fa13e402310dbf7d22d2e1df24dd6b5733b881baa1e6d1a37ac7b2fbe027ea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AE 10388 bytes
font_02_sfnt_off00009b43.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B43 4324 bytes

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