Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bb7bccdee97862…

MALICIOUS

PDF

42.0 KB Created: 2020-08-12 17:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d9d01f3eea0754b9d4d3f6de4ef0b80 SHA-1: e12f3d59ac03bd3e5c0829929ad2c457a50b5559 SHA-256: 72bb7bccdee978627355c2720c7d02e0faee5363bf999df7d1ad89493094cef9
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, suggesting a phishing or scam attempt. The document body, though partially corrupted, mentions "Facebook pixel tutorial pdf", likely a lure to entice users to click the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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.ru/pify?keyword=facebook+pixel+tutorial+pdf
    • http://files.synergyresearchlabs.com/uploads/1/3/2/6/132683000/gobarinida-pikimat-pojezajejefijer.pdf
    • http://files.frameglaze.net/uploads/1/3/1/3/131379554/wudekebakaruliv.pdf
    • http://files.commercialbondstexas.com/uploads/1/3/1/4/131452778/168fdaa7f11d.pdf
    • http://dukigeni.oliverflude.com/uploads/1/3/0/9/130969445/kiviko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/94772764647.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/52823619535.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/how_to_use_apktool.pdf
    • https://cdn.shopify.com/s/files/1/0434/3863/7208/files/neil_rackham_spin_selling.pdf
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/1824404369.pdf
    • https://cdn.shopify.com/s/files/1/0435/4958/9668/files/22144784249.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54344474436.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/wuketej.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/the_biography_of_bill_gates_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/61059766912.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/bukar.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_off0000669f.bin
130789723d9cc3d4f0d9d78041699758f13176b86e6d3c3537ec2e9972ee8392
pdf-font-stream PDF embedded font (sfnt) at offset 0x669F 5200 bytes
font_01_sfnt_off00007859.bin
90e075538e9c07fc16af348fc66c0466dd2f4c9c0773812ade247d2d70f8058c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7859 10292 bytes