Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c1efc9b82ad734…

MALICIOUS

PDF

44.2 KB Created: 2020-08-14 09:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06f92e574a2d833ac164d7e5a2c5230d SHA-1: 4cd49ba6d2c4c8f007c1f4b8fab6072fcb941d33 SHA-256: 29c1efc9b82ad7348bdc98aaf7ee6e35d0a26be45037e8a161fdf7da74f16cdc
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the URL that triggered the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning tactic, common in phishing campaigns.

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=calceos+tablets+patient+information+leaflet
    • http://files.isabelcalkins.com/uploads/1/3/1/4/131453111/niwivimol_tedanur_bapila.pdf
    • http://files.paulmcafee.com/uploads/1/3/1/4/131454345/440d63533a9.pdf
    • http://files.circlejts.com/uploads/1/3/1/4/131437725/82a329c2.pdf
    • http://files.nicolecudzilophotography.com/uploads/1/3/0/8/130814534/wiwepuxokesir-zawajov.pdf
    • https://cdn.shopify.com/s/files/1/0433/3335/3627/files/ecg_interpretation_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/rajusunizinigafomenibup.pdf
    • https://cdn.shopify.com/s/files/1/0434/0049/5260/files/5330173302.pdf
    • https://cdn.shopify.com/s/files/1/0433/3997/2773/files/w3schools_javascript_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0452/3058/8064/files/investment_banking_glossary.pdf
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/cavernous_malformation_brain_radiopaedia.pdf
    • https://cdn.shopify.com/s/files/1/0448/9101/3275/files/tujitujexepagubunowadan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31931154882.pdf
    • https://cdn.shopify.com/s/files/1/0431/6571/2535/files/3035066498.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/zakujumavopoveja.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_off00006109.bin
46e258ca9ef24893a238ee4be30af69d4a3820f8059067d50e26425a3f69e3dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6109 5208 bytes
font_01_sfnt_off0000729e.bin
f912211a0632e3ae4bec53baa203dbea78c212f6b4d620dfe5e15fbbecaeba82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729E 15024 bytes

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