Malicious PDF — malware analysis report

Static analysis result for SHA-256 3380df312a40126f…

MALICIOUS

PDF

42.5 KB Created: 2020-09-19 13:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1460534870d06fbe3b46970994312ed SHA-1: 2b794d26b0b9c59d40e0402069eb273899096d00 SHA-256: 3380df312a40126f9a89308115c7ee9a7fa3d1056ef96d1338b3f88dd3af7218
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a high number of external links, many pointing to Shopify domains but also including a critical redirector link to 'ttraff.link'. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body contains garbled text and what appears to be metadata from wkhtmltopdf, indicating it was likely programmatically generated rather than user-authored content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/wix?keyword=leapfrog+computer+tablet
    • http://newofoben.valecreekrodworks.com/uploads/1/3/1/4/131438437/ecf31d9048581c4.pdf
    • http://fixileset.newhampshirewoodworks.com/uploads/1/3/1/3/131398591/veturivez_fibojogi_rupizerote_belogu.pdf
    • http://files.thefreckledpeddler.com/uploads/1/3/1/3/131378990/didavesubu-dujoz-zinugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/5047726934.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/24590202496.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/fallout_76_fusion_generator.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/capacitance_of_parallel_plate_capacitor.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/sajogonegevosawabif.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3920/files/football_manager_2015_training_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/8087/4139/files/abakazi_twalaba_by_mariam_ndagire.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1008/files/81811512429.pdf
    • https://cdn.shopify.com/s/files/1/0440/7872/7318/files/nolusupakuxepa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6791/5936/files/62286846782.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/9220431458.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/37719919468.pdf
    • https://cdn.shopify.com/s/files/1/0434/0714/7166/files/50812953551.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_off0000671d.bin
eec571836917f0af9e053bc593a0111b91a90cb3e0aa590d213ccddcf1f60b32
pdf-font-stream PDF embedded font (sfnt) at offset 0x671D 5236 bytes
font_01_sfnt_off000078e1.bin
a3dbb29e718471f65f67f29a00a2de0acf6a5419ced7ec56355cccb9e788aba6
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E1 10576 bytes