Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1fa806805e895e…

MALICIOUS

PDF

41.5 KB Created: 2020-08-13 00:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c99d95bb6e0592dc4b6824524c8650db SHA-1: 30950e504833c5906720da3f93a166d41e902c36 SHA-256: 5f1fa806805e895e55a6187f8820dfab7d5122456dd956a0ce3ae9c98bc73e0b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to textbook answers, aiming to trick users into clicking the malicious link. The presence of multiple PDF links and a critical heuristic firing for a malicious redirector strongly indicates a phishing or scam attempt.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=biozone+anatomy+and+physiology+second+edition+answers+pdf
    • http://files.perashlaw.com/uploads/1/3/1/4/131437308/9299312.pdf
    • http://limisap.pdcreccenter.com/uploads/1/3/2/3/132302857/begaduduget_wedela_nenabo.pdf
    • http://files.acmdev.net/uploads/1/3/0/9/130969241/konasikaxosudumudol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/sefuxegonopisek.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/74740501212.pdf
    • https://cdn.shopify.com/s/files/1/0436/8757/5705/files/wugeredananasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4769/0145/files/rivomak.pdf
    • https://cdn.shopify.com/s/files/1/0449/0782/3259/files/49425394545.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/26792408453.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/73863207972.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38743570217.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/58719064194.pdf
    • https://cdn.shopify.com/s/files/1/0433/1002/2814/files/golitiwizanakosodogomodux.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0101/files/megibejotulobex.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/52383370350.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/tififesavuvorowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/can_t_stop_the_feeling_sheet_music.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_off00006260.bin
338f37668b98962cdd33660d454fc57ab068647b2a915732ed7055666091c7b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 5864 bytes
font_01_sfnt_off00007649.bin
1ba6f8f5561e640b98feac43afcbee8cecb035d13144e5d810b558dda6c365a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7649 10216 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.