Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fbf1702da9e67b…

MALICIOUS

PDF

44.5 KB Created: 2020-08-24 05:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8694843798f0d731f09da2edfdecf357 SHA-1: 54e116a423932a5ef4de5ffb4569800660c1d082 SHA-256: 02fbf1702da9e67b1449b195f0cf549a65cee07eac39215e57b274448676830a
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 pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at ttraff.com. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL for the malicious redirector, suggesting an attempt to drive traffic to malicious infrastructure.

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=vlookup+first+match+google+sheets
    • http://files.nashvillephotographyclub.com/uploads/1/3/0/9/130969169/sunuvisubido.pdf
    • http://files.tresasbridal.com/uploads/1/3/1/1/131163740/sotumabupolusedojij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8473/4883/files/19378118467.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/didifurigux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83142526711.pdf
    • https://cdn.shopify.com/s/files/1/0433/6661/3141/files/17967167112.pdf
    • https://cdn.shopify.com/s/files/1/0432/9675/1771/files/carsguide_kia_sportage.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/besaxamobaxupoju.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/lidem.pdf
    • https://cdn.shopify.com/s/files/1/0437/8460/1758/files/45475624560.pdf
    • https://cdn.shopify.com/s/files/1/0464/9700/5720/files/direct_and_indirect_characterization_exercises_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/98246841816.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/fabevep.pdf
    • https://cdn.shopify.com/s/files/1/0435/4211/8555/files/breaking_free_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/side_eyes_emoji.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_off00006f2b.bin
9926e49cf3baa0a946f228ebadd45965f371cf3bd8e4544d7de904a08aa41362
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2B 5456 bytes
font_01_sfnt_off0000819a.bin
fc4c89872d57970407c63321198ef66a1cc0a601a7e2d26ab7e16ae09685d23b
pdf-font-stream PDF embedded font (sfnt) at offset 0x819A 10464 bytes