Malicious PDF — malware analysis report

Static analysis result for SHA-256 1663e5fc8cc4c8d8…

MALICIOUS

PDF

66.5 KB Created: 2020-08-03 01:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f14b09e03c96d76432d67c157164452 SHA-1: 7d473e1d70b614eb0ceff2d05953d25b63fd2825 SHA-256: 1663e5fc8cc4c8d81d03edee2ad0b51373de3995a525a59782e3ca9e4552dd89
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=cast+of+blunt+talk`. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, also contains the primary malicious URL. These elements suggest an attempt to direct users to malicious sites, potentially 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.cc/pify?keyword=cast+of+blunt+talk
    • http://files.nicolloabe.com/uploads/1/3/1/3/131379406/vujikawibij_tulefoto.pdf
    • http://files.madxllc.com/uploads/1/3/0/9/130969146/8852600.pdf
    • http://files.micheldaigneault.com/uploads/1/3/1/4/131407796/bulojekamedekovot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.pdf
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/tefasug.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/7446341499.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9320/files/60763973714.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/xuxuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/joxola.pdf
    • https://cdn.shopify.com/s/files/1/0433/7975/3121/files/55036640912.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdf
    • https://cdn.shopify.com/s/files/1/0427/4873/9740/files/7808132948.pdf
    • https://cdn.shopify.com/s/files/1/0432/9966/8121/files/pinazuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/newiripotubelej.pdf
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/79030929948.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_off0000baca.bin
296c50e02cca81dfbfd0acf633c9c0d34881ad39f2baeb13678504b8e258722b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBACA 4772 bytes
font_01_sfnt_off0000cb18.bin
c9fe77de975e117a49617ed88e0ddf2a0c0e87eaa24494f7994c3a4a02e47250
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB18 15972 bytes