Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa0d4b17303909f…

MALICIOUS

PDF

47.0 KB Created: 2020-08-01 19:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c120002d8a3fb2032d2533cd0224338 SHA-1: eb3c3c27b96200de74316525b4ff93aeac285b13 SHA-256: 0fa0d4b17303909f0c52378cda0edf350c93b4a8f6a936599ecfb5031258e241
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious content, likely as part of a phishing or scam campaign.

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=set+upstream+to
    • http://files.aloeveraseatery.com/uploads/1/3/0/7/130775429/1391905.pdf
    • http://files.coyotemusicstudio.com/uploads/1/3/0/8/130814118/tufiruwerakijij.pdf
    • http://files.drferreras.com/uploads/1/3/0/8/130813757/aff61b1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5618/5000/files/53414755424.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/tezawibuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/89600427204.pdf
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/lijawusisapa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/51009371384.pdf
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/gukebigexijepodag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/46290863200.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/fisetudapajunaxuralasaji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/tixurukamuragegojow.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_off000079e3.bin
adbe2b0a125e9be36eb62644101d534d101f1146c2d4b60fffaaadee3ac04df4
pdf-font-stream PDF embedded font (sfnt) at offset 0x79E3 5036 bytes
font_01_sfnt_off00008ae5.bin
d9361e9fb4f09d92bc115c17ed23cd8f9fe56dc6da830daa16fecf55210b570d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE5 10680 bytes