Malicious PDF — malware analysis report

Static analysis result for SHA-256 f175102ae77ed68f…

MALICIOUS

PDF

40.8 KB Created: 2020-08-17 01:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7949570d9745e1b0ed98c88fc3f98b8 SHA-1: 09082e0f98197ee5698f214f748e1f571cb0c736 SHA-256: f175102ae77ed68f5aecbc83c2358635b526373d388e7dc5663af2bb75846ef3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.com/pify?keyword=blacksmith+vanilla+guide`. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, suggesting a link farm designed to lure users to the malicious redirector.

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=blacksmith+vanilla+guide
    • http://files.kernersvilleyoga.com/uploads/1/3/0/7/130776350/devotenelifito-goluletokejugap.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/97925559119.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4696/files/88954173580.pdf
    • https://cdn.shopify.com/s/files/1/0433/2391/6443/files/atividades_de_alfabetizao_em.pdf
    • https://cdn.shopify.com/s/files/1/0438/3673/5645/files/72020294677.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/63529651019.pdf
    • https://cdn.shopify.com/s/files/1/0434/7448/5400/files/bovamikajumebimuvapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/zizane.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/xidewola.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/autodesk_viewer_for_mac_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3117/files/30060328318.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/retunafamuru.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/xifuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/25996552014.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_off00006103.bin
d5a19883ce7e8bcc881798a281f0df0538b4de009c6fd52657839cc295bbdc8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 5432 bytes
font_01_sfnt_off0000735f.bin
1c629208483c96559e02f910f23f754cfd561153f6357c1a55f94843775575a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735F 10384 bytes

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