Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de36483017d62ba…

MALICIOUS

PDF

45.5 KB Created: 2020-08-22 20:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 635bc20c445a7bdf8433b8425db8c233 SHA-1: 6600526981081fd2c48dde7a02ff614072af9701 SHA-256: 7de36483017d62ba294d227cf7f06bf6587b120720c9cb3a0f1b8984ccde5c89
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body itself is heavily obfuscated and appears to contain garbled text, but it does include the URL 'https://ttraff.com/pify?keyword=obliterated+umbilical+artery+forms'. The presence of numerous links suggests an attempt to lure users to external sites, likely for phishing or to download further malicious content.

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/pify?keyword=obliterated+umbilical+artery+forms
    • http://files.litvaklab.org/uploads/1/3/1/4/131438583/f72229.pdf
    • http://files.mrdelemeester.com/uploads/1/3/1/4/131452741/b3e83751afe.pdf
    • http://butus.senzabigliettodiritorno.com/uploads/1/3/0/9/130969723/narojafutotetudo.pdf
    • http://files.wesleytbrown.com/uploads/1/3/1/4/131438274/lapifi_wirajozo_xikalagada.pdf
    • http://posujaxi.17southband.com/uploads/1/3/0/9/130969723/raxikumudagas_dejajoni_jerawezug_giguzuvikopuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/infinitesimal_canonical_transformation.pdf
    • https://cdn.shopify.com/s/files/1/0436/1833/6925/files/cardinal_ordinal_and_nominal_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7239/files/remove_file_from_git_add.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/ligovilexupizosurulo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/14509651802.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0314/files/38799286802.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/kuwulida.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/94869754549.pdf
    • https://cdn.shopify.com/s/files/1/0440/3858/6518/files/39481847294.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/xoxulop.pdf
    • https://cdn.shopify.com/s/files/1/0437/2670/0696/files/chocobo_racing_psx_iso.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_off000070fc.bin
321a37a66b9ccf5926fc9b8edffde6b16d6fd3f0c66ee0292d7cf31928476f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FC 5436 bytes
font_01_sfnt_off0000835d.bin
fe9fb562bc2daa7d5ae45b8b56a031e116897cc0d651eee5ffce99d3160f11e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835D 11276 bytes

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