Malicious PDF — malware analysis report

Static analysis result for SHA-256 d407689b39ba4c42…

MALICIOUS

PDF

43.5 KB Created: 2020-08-10 18:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73fa410075ad3fd761e7593c4cc82fc7 SHA-1: d402f72e9fae0641132bfffef44c976247c3c16c SHA-256: d407689b39ba4c42dbf6fe27dd14b1be837dd53da50b8fd7485ac547ce92844c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=avocado+oil+extraction+pdf'. Additionally, it features a PDF link farm heuristic, indicating an attempt to distribute numerous links, many of which are hosted on Shopify but point to potentially unrelated documents. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking Shopify URL, suggesting a lure to a malicious site disguised as a document. No scripts were extracted from this sample.

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.ru/pify?keyword=avocado+oil+extraction+pdf
    • http://regak.teachertalkstruth.com/uploads/1/3/0/7/130775735/7018198.pdf
    • http://files.sprucestreetnyc.org/uploads/1/3/2/6/132695620/posasalugudup-mapip.pdf
    • http://files.jecha-networks.com/uploads/1/3/2/6/132682913/83533f4953b52fa.pdf
    • http://files.lindatrossart.net/uploads/1/3/0/9/130968985/kusevenimanotew-sutumumepuf.pdf
    • http://files.premierheartgroup.info/uploads/1/3/1/4/131453985/3968180.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/1996_buick_century_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0406/files/fugowejogovatijipirij.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/47590125165.pdf
    • https://cdn.shopify.com/s/files/1/0430/8769/1925/files/14751091128.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/pilupemekaxajofo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/78834091201.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/canon_eos_6d_mark_ii_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0429/6425/4883/files/80379581638.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/sogajevosaverapefur.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/jezugap.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/kizurun.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_off00006b42.bin
8ac3414798ad6125b559b3de95082417b193c1643096d6ec32cff1223310a735
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B42 5088 bytes
font_01_sfnt_off00007c9e.bin
4236475ac8ccf59473f599025f9d25f2151fb6803df8735120d7512605c15245
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9E 10764 bytes