Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f1f864e4b55f4d…

MALICIOUS

PDF

41.5 KB Created: 2020-08-03 03:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d9870fe88edfa7955974f9889a7503d SHA-1: d9ba1c8f2b0e31b209044311ba6e75079282fcdc SHA-256: d2f1f864e4b55f4d0ba3fb0bb875de8c9fbccc24ff42388f5abe2ce82b0ba248
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm or SEO poisoning attempt. One of the primary links, 'https://ttraff.ru/pify?keyword=google+finance+intraday+data', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was largely unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=google+finance+intraday+data
    • http://files.tobaccofreewisconsin.org/uploads/1/3/0/9/130969452/62f2dc2523.pdf
    • http://files.teachinglearningalliance.org/uploads/1/3/2/7/132740327/5820470.pdf
    • http://files.fistsoffaith.com/uploads/1/3/1/4/131453291/63219e0.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/komiliveduwufum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedifoniwupub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/wuzelonap.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/vedeto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/15606391809.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4457/files/batozasavujaxifutererojo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/96269161245.pdf
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/73162816019.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/malabimakisusewabem.pdf
    • https://cdn.shopify.com/s/files/1/0440/0798/1214/files/dololat.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/taren.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/jejovabim.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_off0000636e.bin
f457d0d6ae7a568ecd08d6be07804c63126776bb95bf50610413821411da3799
pdf-font-stream PDF embedded font (sfnt) at offset 0x636E 5144 bytes
font_01_sfnt_off00007511.bin
8788a494b10be83b7f6d328492e72b52c27167f1374512661da3c1ae69fc85cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7511 10680 bytes