Malicious PDF — malware analysis report

Static analysis result for SHA-256 85acda9166c32c7e…

MALICIOUS

PDF

41.5 KB Created: 2020-08-03 04:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b8448cac1adbe86b9daf70133685020 SHA-1: a1e386e056437011f019b16c98ad1972404ed8ed SHA-256: 85acda9166c32c7e0e10072b02fa83ac29bd58c33a757c9e0fe53e8316a0c9f8
130 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=dd-+214+blanket'. Additionally, it exhibits a PDF link farm pattern with 16 external PDF links, many hosted on Shopify domains, with the first identified as 'https://cdn.shopify.com/s/files/1/0436/1607/5939/files/kofexanebalinakunisam.pdf'. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF filename, suggesting a lure to click on the malicious link. The 'SE_URGENCY_LURE' heuristic further supports the social engineering aspect.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=dd-+214+blanket
    • http://files.kangarooislandvet.com/uploads/1/3/0/8/130814466/5375044.pdf
    • http://files.castirongrilllubbock.com/uploads/1/3/0/9/130969717/47b9553b00f1.pdf
    • http://gizowomuj.turtlebee.co.uk/uploads/1/3/0/9/130969426/98b28.pdf
    • https://cdn.shopify.com/s/files/1/0436/1607/5939/files/kofexanebalinakunisam.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/appositive_phrase_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/27951180121.pdf
    • https://cdn.shopify.com/s/files/1/0428/6342/7751/files/wiradakepugerixoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68513135127.pdf
    • https://cdn.shopify.com/s/files/1/0428/8721/7311/files/6971102082.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/morifutav.pdf
    • https://cdn.shopify.com/s/files/1/0429/2424/5155/files/gimob.pdf
    • https://cdn.shopify.com/s/files/1/0435/7488/6563/files/seruvepizowib.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/kosefanojogop.pdf
    • https://cdn.shopify.com/s/files/1/0440/3832/4374/files/17291186679.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/bonakafiwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/71746291282.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_off00006320.bin
6db1a98d98aed0c6b0cf5b054d9f4429a3acf50693985ff5ad6b9bb7e9f810fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6320 5052 bytes
font_01_sfnt_off00007476.bin
ae77928dae79344f42ad5be570f8743329a1dffaf53acd38be5e52be36a7c945
pdf-font-stream PDF embedded font (sfnt) at offset 0x7476 10944 bytes