Malicious PDF — malware analysis report

Static analysis result for SHA-256 115fbf82fddf8141…

MALICIOUS

PDF

41.3 KB Created: 2020-08-21 11:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 366ad536dba021b7df4fb6ccfc953e63 SHA-1: 6d3def0a8e668fa2fa6cb41be7ca97a4caeffa33 SHA-256: 115fbf82fddf81410be4ee9d39f3fc44f86be9e701c977993c05449ef50529f8
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external PDF files, suggesting a link farm or redirection tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=sailor+moon+transformation+phrase'. The document body, though heavily obfuscated, contains this URL and other Shopify links, indicating a potential phishing or scam lure. No scripts were extracted, but the presence of malicious redirectors and a large number of external links strongly suggests a malicious intent to lead users to harmful 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=sailor+moon+transformation+phrase
    • http://files.flcsac.org/uploads/1/3/0/9/130969712/4275594.pdf
    • http://files.bethanyiowafalls.net/uploads/1/3/2/7/132740350/najunaxujevo-fesesanikode.pdf
    • http://files.professordos.net/uploads/1/3/1/4/131438759/1773627.pdf
    • http://files.mattituckpack39.org/uploads/1/3/1/4/131438419/9214260.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/encyclopedia_judaica_vol_22.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/vitapipelazav.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/crop_rotation_notes.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4056/files/pijifirofitopifo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/rusavidodimotawep.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/85208288354.pdf
    • https://cdn.shopify.com/s/files/1/0440/8036/5733/files/creating_accessible_tables_in.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4577/files/29917111722.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/inseminacion_artificial_en_camelidos_sudamericanos.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/95608157703.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9663/files/wimus.pdf
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/ragnarok_mobile_alchemist_job_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/graco_4ever_manual.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_off00006498.bin
6fac710b3e2639688635cff39c1c9875c7617bb559fbac210bfae536a2bd970c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6498 5244 bytes
font_01_sfnt_off00007637.bin
3dc17127ab840669a3f2d6e551fd5c1751aadf606905c5d85ee4e76eb3e162e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7637 9956 bytes

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