Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20729c59835888e…

MALICIOUS

PDF

39.4 KB Created: 2020-07-13 18:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee2eebc298eff94c0be1ae58b048a919 SHA-1: c3264241bbfd1df31f6bc30a5d0214fca46c48f0 SHA-256: c20729c59835888ebe04a0c1aad6da7d65907f0a231daa36df4c1c36e3c37a75
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'seating arrangement puzzle pdf', likely a lure. The PDF also contains a large number of external links, many hosted on shopify.com, suggesting a link farm or distribution mechanism. No scripts were extracted, but the presence of a malicious redirector indicates a phishing or malware distribution attempt.

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/wb?keyword=seating%20arrangement%20puzzle%20pdf
    • http://files.meridianbodycare.com/uploads/1/3/1/8/131857193/6976761.pdf
    • http://files.winkkidsco.com/uploads/1/3/0/7/130740217/7462154b5d32e8.pdf
    • http://files.jmcm-uganda.com/uploads/1/3/0/8/130814984/2168544.pdf
    • http://files.chemeketaesol.org/uploads/1/3/0/8/130814926/768363.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/batovumuzulininoli.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/lovusoliwetalemilalarur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://kukodojepi.files.wordpress.com/2020/06/gifamawinuba.pdf
    • https://zazumug615548209.files.wordpress.com/2020/07/somutupi.pdf
    • https://gusuwabawujo.files.wordpress.com/2020/06/19164877042.pdf
    • https://tumolodiku.files.wordpress.com/2020/06/51698953146.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/gadafujifuxejemodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/majusotogozarow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16485275060.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaduvezumutup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/28881952406.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.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_off00005f38.bin
15051c943375bfd48dfc51f68724b3709d981feae99a41d021bd6a86aa13faa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F38 5108 bytes
font_01_sfnt_off0000707c.bin
c17abcf5272fbb9c866960696168505a4b304149b917790a7da00309aa59bf57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707C 9436 bytes

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