Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b77ae642f928c45…

MALICIOUS

PDF

48.2 KB Created: 2020-07-28 02:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc1710e27add7593b2b8399b9a37032f SHA-1: f545c1320176b5335998688df7f05c20db5ea7da SHA-256: 2b77ae642f928c45a54a0bea81ed99314571b779ed893e1a932bdc1b6b73b991
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'ttraff.com'. Another critical heuristic identified a PDF link farm, with the primary link pointing to a Shopify domain. The ML classifier strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of the 'shell shocked ww1 answers' string and the metadata suggest a lure.

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=shell+shocked+ww1+answers
    • http://files.timothymperez.com/uploads/1/3/2/6/132681985/kovafasufuvapedizar.pdf
    • http://files.quintemozartfestival.ca/uploads/1/3/2/7/132740637/kowubefixalevopixo.pdf
    • http://files.thebestclassatirving.org/uploads/1/3/0/9/130969211/monebozi_tewawaw.pdf
    • http://files.faithmadegenuine.com/uploads/1/3/1/4/131453188/vewixajetup_xugen_momupe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0019/1400/files/42119039710.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0024/files/95043893693.pdf
    • https://cdn.shopify.com/s/files/1/0433/0618/8955/files/pobupadigipuwig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9160/8227/files/tugutidasuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/58682572800.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/baganuvekobirupatemobosu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2509/5062/files/4992441545.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/92384974570.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/89508429739.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdf
    • https://cdn.shopify.com/s/files/1/0438/7287/8747/files/jogisako.pdf
    • https://cdn.shopify.com/s/files/1/0428/5887/2998/files/46137547074.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/54889690153.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e0e.bin
bdb38f73c1fe5da4b1f933ea07ba987909df8dcf0b0e7df13b690128265b7116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0E 5000 bytes
font_01_sfnt_off00008f05.bin
eab9e01caf40021e7287b8d7e659471d92f4c192539ba3b30817f04ae0622e11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F05 10240 bytes

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