Malicious PDF — malware analysis report

Static analysis result for SHA-256 7346fb1b51d0217e…

MALICIOUS

PDF

42.2 KB Created: 2020-08-03 10:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e39188a074133718a147bf8ef57d05fa SHA-1: 510563b1d23b331871c7d6ca2193c9806266b29c SHA-256: 7346fb1b51d0217e86eb5e9acfcb16dacd35ce2abc5138f81deb0700abf87a16
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=how+to+delete+orders+on+amazon', indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains this URL and other Shopify links, reinforcing the malicious intent.

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.ru/pify?keyword=how+to+delete+orders+on+amazon
    • http://files.ridgelinefarm.org/uploads/1/3/0/7/130740563/defum.pdf
    • http://files.brewerfirstrobotics.com/uploads/1/3/2/6/132681558/gitulebe.pdf
    • http://files.better-gro.com/uploads/1/3/0/7/130739570/d9026a65.pdf
    • http://files.keitharchitects.com/uploads/1/3/1/6/131606803/wuxuwapas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4312/7447/files/18199132568.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1782/files/17306926020.pdf
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/xizareruzezo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/66041545802.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8685957786.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/16647148183.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/tubuxoxefeti.pdf
    • https://cdn.shopify.com/s/files/1/0437/9544/7970/files/nogubararat.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/21425611237.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nadogenomaxijedunebenez.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/52777025527.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/pevoselilot.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/rujatereboluf.pdf
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/42591604970.pdf
    • https://cdn.shopify.com/s/files/1/0436/9419/4843/files/48019934795.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_off000066fd.bin
d11664765908f3fe2c9c8050142adc756ffde556835bbdb2c141e979522ad358		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FD 5076 bytes
font_01_sfnt_off0000783f.bin
e4894fea6e5eca501ab17c6076a5d1835bcf0c1e28d7482d81f97fea1f555e70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783F 10320 bytes

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