Malicious PDF — malware analysis report

Static analysis result for SHA-256 709249942c5d05fb…

MALICIOUS

PDF

34.3 KB Created: 2020-08-31 00:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2c2343ec93fc5672636ab5e2209d57b SHA-1: e9cc53a522a9288d6852fc9b9fac0a33971d1740 SHA-256: 709249942c5d05fbe6e18ce1d031303074df76d324ca3610e2cb8d8a87d1c80f
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a redirector URL, indicating a phishing or malicious content delivery attempt. The document body, though obfuscated, contains text related to a 'Herman miller ergon chair manual' and a URL, suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links further supports the classification as a link farm designed to host malicious content.

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/wix?keyword=herman+miller+ergon+chair+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7224/2342/files/ninufovibevoto.pdf
    • https://cdn.shopify.com/s/files/1/0430/8107/2789/files/tafojusapemejat.pdf
    • https://cdn.shopify.com/s/files/1/0437/1621/4936/files/xujajovonezuzubosipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0908/9447/files/gubavidasikitavage.pdf
    • https://cdn.shopify.com/s/files/1/0438/3509/7245/files/birijunafuxoked.pdf
    • https://static.usrfiles.com/ugd/47b1e8_4568b67182aa492b81adf765b92e2ab5.pdf
    • https://static.usrfiles.com/ugd/01bc73_33c1cc6931b14b6b88240a0542768537.pdf
    • https://static.usrfiles.com/ugd/3f80ec_58ed854ef2d343e5ba053b0e695eea35.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_2851832663034a95b5eb71526aa34085.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cf8069f8c0d426ab0bcfc82345a14d2.pdf
    • https://static.usrfiles.com/ugd/822ecd_e7c1ea154c434967add847e1f5a0b376.pdf
    • https://static.usrfiles.com/ugd/0d2908_9e24f1a8ad6546ddaf3d45f071f18d72.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_off00004a5f.bin
45ce1cd3cf228c080582d1125d2f39ac2fac3b2184ee1a2aaf2f00c3374bcb4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A5F 4996 bytes
font_01_sfnt_off00005b1f.bin
ce8e15fadf4615fb4e890b635044313bf128d5a8e9a898fd3e1b70e3e194a5d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1F 9768 bytes