Malicious PDF — malware analysis report

Static analysis result for SHA-256 7233ced6b4ff3ae1…

MALICIOUS

PDF

46.3 KB Created: 2020-08-30 10:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6a763237fb8437fc20219dc9715795d SHA-1: a9d894dafddfba85c378ffff2e2c05e41b31e2fc SHA-256: 7233ced6b4ff3ae1a51dcac04348d590a6804302516b69b7efdf6da6d2fcaf45
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, with one leading to a known malicious redirector. The document body, though obfuscated, contains text related to 'Gogo scooter repair manual' and includes the malicious URL, suggesting a lure to trick users into visiting malicious sites. The presence of numerous PDF links, many pointing to benign Shopify URLs, indicates a link farm strategy to improve SEO for the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=gogo+scooter+repair+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8383/3249/files/biblical_meaning_of_numbers_in_the_bible.pdf
    • https://cdn.shopify.com/s/files/1/0451/5692/5594/files/44997809957.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/kadifunodalokuxixoluvunix.pdf
    • https://cdn.shopify.com/s/files/1/0443/6181/0076/files/wufigofivipaloviti.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/dibosanisijimigat.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/xexuzalukolaxawa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6141/files/jeliduwalogam.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/rewatarawipijifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/pububolixime.pdf
    • https://static.usrfiles.com/ugd/ea78e0_47ee7b22e7854a208de7c148a42bcfac.pdf
    • https://static.usrfiles.com/ugd/80c1db_fc9a535aad2f4ce4a0844b908bfab037.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_off000076dc.bin
493fe31ee9aefcf22f9a927003e614ad14d4981e4ea0ed1f6106140621f747bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DC 5284 bytes
font_01_sfnt_off000088c9.bin
a61a8a727ec96b1b6fd15e9b182bb9fbe7521458d0b2b6cfc911fc3f3670b4a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C9 10540 bytes

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