Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67fc4f9a2b2d1f3…

MALICIOUS

PDF

51.0 KB Created: 2020-09-04 18:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3be818b405dbb28261ddc750b6ee117 SHA-1: 84d0c3b27c865fc85b598a01288833e33beaec76 SHA-256: a67fc4f9a2b2d1f36b070bed9bfba48eeb27b68eff056f45952c122099709ccf
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is disguised as a free employee attendance register template. This indicates a social engineering attempt to drive traffic to malicious infrastructure.

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.me/wix?keyword=free+employee+attendance+register+template+excel
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/iannotate_vs_expert_vs_goodreader.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/30663016709.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/bubarotok.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/damuzupozenijawejix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/kemelutivomosusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3653/2136/files/zawepogalelo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/xesog.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7974/files/xavukezatezeka.pdf
    • https://cdn.shopify.com/s/files/1/0441/0382/7608/files/analytic_geometry_problems_with_solutions_and_graph.pdf
    • https://cdn.shopify.com/s/files/1/0431/5342/4540/files/pokemon_ds_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0436/8505/2566/files/ladibanexokafuvujut.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/latin_jazz_bass_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5316/2394/files/33865032232.pdf
    • https://cdn.shopify.com/s/files/1/0459/9100/2269/files/maple_leaf_cement_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/nejapom.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1233/files/amortissement_lmnp_reportable.pdf
    • https://cdn.shopify.com/s/files/1/0436/5464/3877/files/afm_in_zimbabwe_constitution_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4142/2492/files/pvc_id_card_printing_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6229/files/felatus.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_off00008874.bin
8cb84899ad7f59cc273748b82b657543eee241e96500139106d59337b7efcaaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8874 5516 bytes
font_01_sfnt_off00009b2f.bin
e91828305d5a2f6c710ff82ea5b8a8cdb46d9315458607e74bfcf969f4f939df
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2F 10472 bytes