Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b13d86312ecc3b…

MALICIOUS

PDF

44.7 KB Created: 2020-08-04 05:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d0413041391fa0038362bc862d8452b SHA-1: e97b125ebd3d89430af0236e611470b3a0a99504 SHA-256: b2b13d86312ecc3b4a8e489983b2a7a45e9979360ad37ab771c807df93b3b31d
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). The document body, though heavily obfuscated, contains the text 'Pancakes on the rocks menu pdf' and the malicious URL, suggesting a lure to download a malicious file disguised as a menu. The ML classifier also strongly flagged this PDF as malicious.

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=pancakes+on+the+rocks+menu+pdf
    • http://files.destinyhouseministries.org/uploads/1/3/0/7/130776401/7458330.pdf
    • http://files.andrewpevny.com/uploads/1/3/2/6/132682134/terefop-vumenegide-jovupuw.pdf
    • http://gajilid.marschlink.net/uploads/1/3/0/7/130776046/4dc97cfff7e.pdf
    • http://files.crta.ca/uploads/1/3/1/3/131384359/sogonoduxemofuj.pdf
    • http://files.gearjammerrc.com/uploads/1/3/0/8/130813095/5affa0.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0398/files/bodojiposekazidefet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/vezug.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/kitigufitesif.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/busidigo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/mivobigosapowamanowasuluk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5771/7152/files/magowuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/rufotoxokugar.pdf
    • https://cdn.shopify.com/s/files/1/0433/4367/5560/files/senizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/geriwepipon.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/84304928089.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/56207870410.pdf
    • https://cdn.shopify.com/s/files/1/0435/4198/7479/files/fobegobesaviwubumuto.pdf
    • https://cdn.shopify.com/s/files/1/0428/8721/7319/files/95190821563.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_off00006566.bin
6882d977f693c40bb0835af5d6c2a5d0762cb37416d350b2718e8bf655b8c618		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 5428 bytes
font_01_sfnt_off000077b1.bin
a591b38a711825145abf2d0612a2db1444223ac7154b95dd6784aca655d9f6e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B1 14724 bytes

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