Malicious PDF — malware analysis report

Static analysis result for SHA-256 affd011775629e62…

MALICIOUS

PDF

48.7 KB Created: 2020-08-05 05:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e814222b2331f56d54f837e4da5673c7 SHA-1: 81518f5ce459915d3b771094682600b24fc1129d SHA-256: affd011775629e626c3724f54d7d6724ae46d93ddca38f5255f90fa6fb6702d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as information about veterinary laboratory equipment. The ML classifier strongly indicated maliciousness, and the PDF structure includes a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. The primary malicious IOC is the ttraff.com redirector.

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=veterinary+laboratory+equipment+pdf
    • http://files.hudsonvalleybookdesign.com/uploads/1/3/1/3/131381605/vudetiwida_garovifu_ravegogigamu_damez.pdf
    • http://files.salightgroup.com/uploads/1/3/1/4/131406348/varopiwefefilil.pdf
    • http://files.marcellakasparart.com/uploads/1/3/2/8/132814241/7979584.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7909/files/5494396916.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/sarig.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/diluxijivo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/50408685509.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/sesotepoxosuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/44883637566.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/11068645908.pdf
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/gefufivasugasemimojezexuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4998/files/73199914907.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/xovob.pdf
    • https://cdn.shopify.com/s/files/1/0436/5054/7870/files/mutomududuvategina.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/tegegopu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/ditej.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/6154881028.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/dixetaxo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fda.bin
6f9035b8971943842008be527cca30463450927989977b2188d8087ac5c003b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDA 5344 bytes
font_01_sfnt_off000091f1.bin
f211b682c16e4fc46eadfe9ae3bcaa9e6084d5402a5f65ebaa4f514e0e2911a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F1 10536 bytes

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