Malicious PDF — malware analysis report

Static analysis result for SHA-256 0809ef670e4b9c15…

MALICIOUS

PDF

47.7 KB Created: 2020-07-28 08:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b5203280dff7228d6e7daf1cbcf26a2 SHA-1: a0fafdded690aa8fac1ba5c291120e8d6fc25424 SHA-256: 0809ef670e4b9c15ba5363977e4f9ff0ae0e3a74e662ecc28d31bf6529c4f1e2
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, suggests a lure related to a 'collection account on credit report', aligning with phishing or scam tactics. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm used to distribute malicious content or obscure the true destination.

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/pify?keyword=incorrect+collection+account+on+credit+report
    • http://files.plaisanceenglishsetters.com/uploads/1/3/1/8/131858045/kofobotodopujur_puvixe.pdf
    • http://files.jeffcofiretraining.org/uploads/1/3/2/6/132681409/4110604.pdf
    • http://files.ransomerecords.com/uploads/1/3/0/9/130969693/gelaluvak.pdf
    • http://files.nevrapoint.com/uploads/1/3/1/4/131452735/buvanusojibamuz_dabonojaxon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9257/3334/files/xakivegaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/lexasatopitofuwenobu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/gepolipewenigowobazupupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/3819405392.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/8564533533.pdf
    • https://cdn.shopify.com/s/files/1/0430/0881/9349/files/risaxinofurogowijisob.pdf
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/44905489453.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74523611049.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7810/files/guzaladeguvexezovalalup.pdf
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/mapiluresimam.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/pixazudu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4103/8229/files/litanulujelapevin.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_off00007f01.bin
49bf1370d6a0197e3be706edbcca4885acbd2e25797518cba5cdfd79bebd80d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F01 4708 bytes
font_01_sfnt_off00008ef3.bin
b2fdb5d781f5d4e2a5aa6ec52d2b080175d851a8e5285266dcfddbc070eb9aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF3 10196 bytes

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