Malicious PDF — malware analysis report

Static analysis result for SHA-256 309ce6886f4d150a…

MALICIOUS

PDF

47.2 KB Created: 2020-08-24 19:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ce5ee43729c7f463d66a5d2190663b8 SHA-1: 784be1b92fdb724288f8f2e3d6c41d5c3bf6bc88 SHA-256: 309ce6886f4d150abc2460e96ac917490f602b66e6ba7ed3f45b8b68596d29a7
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'welding blueprint reading worksheets' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=welding+blueprint+reading+worksheets
    • http://files.davidebonazzi.com/uploads/1/3/0/7/130776324/196276.pdf
    • http://files.huesoproductions.com/uploads/1/3/0/8/130873902/1326642.pdf
    • http://jiponif.tulsalines.com/uploads/1/3/0/8/130814933/d2b127250.pdf
    • http://sasufo.helpurchild.net/uploads/1/3/1/6/131606271/gufoxufu_romugiv_tizitazejodup_fokoxaso.pdf
    • https://cdn.shopify.com/s/files/1/0434/4116/0344/files/li_ion_vs_li_polymer_battery_performance.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/2007_ninja_250r_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/78245452930.pdf
    • https://cdn.shopify.com/s/files/1/0432/4160/3239/files/dynamics_of_machinery_formula.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/dupezugoluxotuvuwiferi.pdf
    • https://cdn.shopify.com/s/files/1/0460/8625/8852/files/acog_guidelines_for_breast_cancer_screening.pdf
    • https://cdn.shopify.com/s/files/1/0432/2951/1835/files/funot.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/xagozosigilegoremi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/84329032041.pdf
    • https://cdn.shopify.com/s/files/1/0440/0830/8886/files/ret_pally_talents.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/51176422235.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070b1.bin
dff502ca9526148d671ccc7e408563910dbbb2ad22837e93bf84c67e62822f83
pdf-font-stream PDF embedded font (sfnt) at offset 0x70B1 5528 bytes
font_01_sfnt_off0000837b.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x837B 1800 bytes
font_02_sfnt_off00008c08.bin
23050afd199918d60328d5649ccb9a44239b9d91e44271450806e1a088a15fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C08 10428 bytes