Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc3e425ecf3c5fd…

MALICIOUS

PDF

46.8 KB Created: 2020-08-05 05:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15c354e3b22d100e6bad9a1194372ee4 SHA-1: a09aa9cc7624aa4e249349a44aeb057b7b73ba6e SHA-256: bfc3e425ecf3c5fdb9efdc217d8d57c18becc32cac7df06c30093348b447849e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. It also exhibits characteristics of a link farm, embedding a large number of external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains the title 'Inductive and deductive approaches to research pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site.

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=inductive+and+deductive+approaches+to+research+pdf
    • http://files.scqhaqueen.com/uploads/1/3/1/4/131482997/9211b29c54.pdf
    • http://files.lifeistooshortnottobeirie.com/uploads/1/3/0/7/130775071/danot.pdf
    • http://files.micahblackarts.com/uploads/1/3/0/9/130969469/f48031a5f6ef59b.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/12440477255.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1142/files/orthographe_du_francais.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/3994392769.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/33765541260.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/10379968915.pdf
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/xipujusuza.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/mudivewiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/breast_cancer_awareness_flyer.pdf
    • https://cdn.shopify.com/s/files/1/0438/0216/5410/files/forensic_accounting_and_fraud_examination_kranacher.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2957/files/92322576919.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/sutaso.pdf
    • https://cdn.shopify.com/s/files/1/0441/1519/8104/files/32357828448.pdf
    • https://cdn.shopify.com/s/files/1/0437/8954/9726/files/toregedejaru.pdf
    • https://cdn.shopify.com/s/files/1/0429/4646/1855/files/50777687913.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/96095801790.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007985.bin
8af0c5412d27a16a71befbf7e089defeab566eea826e791ca6fbc4a64a2078cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7985 5208 bytes
font_01_sfnt_off00008b43.bin
01e14c100fcc57a327bc1eccae0a0b1b87c25a7cf361c608139ea1ff88ef7dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B43 10204 bytes

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