Malicious PDF — malware analysis report

Static analysis result for SHA-256 464bad533a672801…

MALICIOUS

PDF

42.5 KB Created: 2020-08-22 23:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1be933da2cfa01aae4e42efa2b29bf3 SHA-1: e5d3bc4766c69fb81ea32a3867f14134893fb42e SHA-256: 464bad533a67280190c16cc22e7d8907d244f4106c2bc0bd4053179b249c72a5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that redirects to a known malicious domain, ttraff.com, disguised as a study guide. This indicates a phishing or social engineering attempt to redirect the user to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=maryland+driving+permit+test+study+guide
    • http://parajiwud.hopefulbyhope.ca/uploads/1/3/0/7/130739564/1915aac2e734.pdf
    • http://files.staceylynnsworkshop.com/uploads/1/3/1/4/131437530/vuxibanojifasi_zutaf_tiwexuferom.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/63531395760.pdf
    • https://cdn.shopify.com/s/files/1/0432/8869/0841/files/ielts_simon_writing.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/pasevatuworumarug.pdf
    • https://cdn.shopify.com/s/files/1/0433/4436/3678/files/temoxabitudovakojazuti.pdf
    • https://cdn.shopify.com/s/files/1/0437/5828/9045/files/adobe_for_mac_catalina.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/gorakaweborodeduku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/gafobapopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/35219906160.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_off000066cf.bin
25e2ef66ecff60c130371388bad22bcc905ba04515151a4c9ea535c808bb245d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CF 5448 bytes
font_01_sfnt_off00007953.bin
837cbbf1e75dd96b68dffacd092cb2f555ce95201f3c2d8739eb6c09119f7c2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7953 10524 bytes

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