Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcdb36d5097d9668…

MALICIOUS

PDF

46.0 KB Created: 2020-07-31 03:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1018ef6f287509165739efc6158eb86 SHA-1: 41a34f2c109ff28c176875dadf269db53877c79b SHA-256: bcdb36d5097d96684bf75c4fd3845c994fb7f9040ff15d8bc50f2fae9a1552d6
150 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector and part of a link farm, with the primary malicious URL being ttraff.com. The document body, though heavily obfuscated, suggests a lure related to employment certificates. The ML classifier strongly flags this PDF as malicious. No scripts were extracted, but the presence of malicious redirector links points to a phishing or scam attempt.

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.com/pify?keyword=employment+certificate+template+pdf
    • http://files.genuinecollection.ca/uploads/1/3/1/4/131406288/6285347.pdf
    • http://files.magiqatlas.com/uploads/1/3/0/8/130814513/zivatemurijupizowigi.pdf
    • http://files.sebastianmusic.org/uploads/1/3/1/3/131383727/819162.pdf
    • http://files.gardenclubofyarmouth.org/uploads/1/3/1/4/131408942/7102347.pdf
    • http://files.sebastianmusic.org/uploads/1/3/1/3/131383727/81
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/82532403355.pdf
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/nafowezuxevipix.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/wigubagifudono.pdf
    • https://cdn.shopify.com/s/files/1/0430/1016/2837/files/jimigofufutoraketaxamew.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/7124285431.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8545/files/84134241403.pdf
    • https://cdn.shopify.com/s/files/1/0440/1777/8838/files/gojonizelavoteja.pdf
    • https://cdn.shopify.com/s/files/1/0433/4849/2438/files/32256762221.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xirapekewovefosisukepeja.pdf
    • https://cdn.shopify.com/s/files/1/0429/7244/6873/files/fikuzidetumuvemol.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/kiligemogazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/soxewovima.pdf
    • https://cdn.shopify.com/s/files/1/0433/8571/6886/files/xufisamutewasosu.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_off000078cb.bin
409328114f4b3e5ffac8c516769892d457bd3e193424569e100fbb36b9a4e109
pdf-font-stream PDF embedded font (sfnt) at offset 0x78CB 4968 bytes
font_01_sfnt_off0000899d.bin
03e314548b82179ffdbd03235731924592ea5c84055ea1a811731b312060024f
pdf-font-stream PDF embedded font (sfnt) at offset 0x899D 9672 bytes