Malicious PDF — malware analysis report

Static analysis result for SHA-256 685f80f29268f161…

MALICIOUS

PDF

50.9 KB Created: 2020-08-06 13:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a33c9b8b707e75934c6ca6405ab1befc SHA-1: 4eb570557db881549a2e438a5175aa50afb0c515 SHA-256: 685f80f29268f161f09e39442a3f94c543b6d776052171a761d51f20c968f531
154 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. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=natural+causes+of+air+pollution+pdf', which is flagged as malicious. This suggests the document is designed to lead users to malicious content, likely for phishing or malware distribution.

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=natural+causes+of+air+pollution+pdf
    • http://womoro.gracefulrosaries.com/uploads/1/3/0/8/130813420/00de91dc.pdf
    • http://rabawubuz.stannartsandculturalcenter.org/uploads/1/3/0/8/130813834/7970335.pdf
    • http://files.studio519.net/uploads/1/3/0/7/130776542/024069.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/1864991430.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/modafat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1095/files/fusionner_des_fichiers_en_un_seul_en_ligne.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/tovexufavoganu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5809/2439/files/52853956569.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/jefowafenobilenugirupuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/17097300976.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/49118620120.pdf
    • https://cdn.shopify.com/s/files/1/0434/1599/4529/files/65146500504.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c71.bin
2efad495106094a5751bbfc39cba236dad3e3bda6e8560f9339b6270f974dd56
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C71 5000 bytes
font_01_sfnt_off00008d7c.bin
307adf7710b97d2c9089bcf70421bcb9c61cc59869449a9465bef37943a9d9f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7C 10328 bytes
font_02_sfnt_off0000b0d1.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D1 4324 bytes