Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f824ad1ab6e6d0a…

MALICIOUS

PDF

40.9 KB Created: 2020-08-23 00:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b086d6c498d284c7d5e8655116c44fdb SHA-1: fa8ee75c90f8e6e1c0bc9d5e74b01b20e816d8a9 SHA-256: 7f824ad1ab6e6d0a02374b34cc1ecb3a5c36960a536f27f9478e8aff24b9dd91
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though obfuscated, contains text related to 'formal dress shops australia' and a URL that leads to a link farm, indicating a deceptive lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful infrastructure.

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=formal+dress+shops+australia
    • http://nufidafi.sbresourcegrp.com/uploads/1/3/0/7/130775350/keduti_tujedorewo_benixaximurax.pdf
    • http://files.mmakhaolak.com/uploads/1/3/1/6/131606861/vawopigiwow.pdf
    • http://kipid.themjharness.com/uploads/1/3/2/8/132814930/3e410c77dc9.pdf
    • http://files.glennhousevr.com/uploads/1/3/1/4/131453592/joxekelol-jarotevira-kapixafebuti-zewetejid.pdf
    • http://wurip.millracegolfcourse.com/uploads/1/3/2/6/132681946/tamow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2755/4723/files/nccn_acute_lymphoblastic_leukemia_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54171278856.pdf
    • https://cdn.shopify.com/s/files/1/0439/4713/1035/files/10605774781.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/62052645578.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/moniwexiketokapofaxiver.pdf
    • https://cdn.shopify.com/s/files/1/0427/8019/7031/files/logalikabawopixuve.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/4948/2400/files/3654937510.pdf
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/70933281511.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_off00006515.bin
e39df198d363cb02f54500cb6afb06fd2ae7f8a1def440316d432de301406bf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6515 5156 bytes
font_01_sfnt_off00007676.bin
31d1fb0468599891b41d1210de5f5f81837891aaea62e9c21841d05dc751c734
pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 9456 bytes