Malicious PDF — malware analysis report

Static analysis result for SHA-256 82750e097c448292…

MALICIOUS

PDF

67.0 KB Created: 2020-07-30 21:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 008f884316f3e3a4189a2f0504432946 SHA-1: 78d58958bbaa245eb2f545f97dca0a5397c82eab SHA-256: 82750e097c448292de46be79a16dd2f78d7ad96f6f1593c5c426aa9b12d2da6c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. Heuristics indicate this is an advance-fee scam lure, likely intended to trick the user into clicking the malicious link to initiate a fraudulent transaction. No scripts were extracted, but the presence of embedded links and the scam lure strongly suggest a phishing or social engineering attack.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=polycythemia+in+neonates+pdf
    • http://files.leoxiiiseminarie.org/uploads/1/3/0/7/130775027/melojosiwi.pdf
    • http://files.bethanyclarephotography.com.au/uploads/1/3/0/7/130775172/4718640.pdf
    • http://files.carrcommunity.org/uploads/1/3/0/7/130776460/3e9d1c7edf.pdf
    • http://files.myhandymantips.com/uploads/1/3/1/4/131438869/6d57daebb32c2.pdf
    • http://files.inthegarageonline.com/uploads/1/3/1/4/131411762/eeb058f6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/17992732351.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2758/files/vuzubakogowedufiwasov.pdf
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/nedepegipedidux.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/pewikinudoxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/rupibomejerizikatoxisum.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/nudupoxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/lovabikuludo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/gisoremifovonipugewuboguk.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/31423368651.pdf
    • https://cdn.shopify.com/s/files/1/0439/8006/2878/files/dovemelefonuzunijuwezojin.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/88873140954.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_off0000c530.bin
6b3c3d156cabdb8f0f518cd415991e96a6e8f897f6c6e751b52df0f9f248360a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC530 5192 bytes
font_01_sfnt_off0000d6b1.bin
620d677614ff4c686567ff9fe1d0cae0ae02ffe65519fe14a9c1d3d0713fa2a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B1 12140 bytes

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