Malicious PDF — malware analysis report

Static analysis result for SHA-256 0012c83a821cfba1…

MALICIOUS

PDF

55.3 KB Created: 2020-08-01 19:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9cfe0ca855f862b8ec52b005ed3d8d1 SHA-1: c4e954de652f71d051b50a626c37d8bff021826b SHA-256: 0012c83a821cfba13976e8f12c4402d81ad00e8c3964049cf5f3612e6f3b7f42
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malware or phishing page. The document body also contains numerous links to PDF files hosted on Shopify, suggesting a link farm or a method to distribute further malicious content. The ML classifier strongly indicated maliciousness.

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=the+scorch+trials+movie+times
    • http://files.earthspirithearth.com/uploads/1/3/2/6/132682819/4570787.pdf
    • http://files.opunakesurflifesaving.com/uploads/1/3/0/8/130814513/gezitowejukejekojuko.pdf
    • http://files.labclaes.com/uploads/1/3/0/8/130874583/9185982.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/gupuvixomisexat.pdf
    • https://cdn.shopify.com/s/files/1/0436/6968/4377/files/gamestop_black_ops_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2965/files/23507464188.pdf
    • https://cdn.shopify.com/s/files/1/0440/3901/2502/files/90937149485.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/59368447654.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/88957594644.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/sowopuzanibukiliwup.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/25105254603.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/zumogizarebafogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/94099923579.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/jikupinerigim.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_off00009aba.bin
88a3260fa6c982b4b357de94e7f3945231aa0e95c49e4dab80a7ff9b285964fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABA 5048 bytes
font_01_sfnt_off0000abc2.bin
b07f51533b937e441811f2222ed821ce11e00dc08c241b12a32e13b1f18d1676
pdf-font-stream PDF embedded font (sfnt) at offset 0xABC2 10660 bytes