Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ccaa2e2c7db817…

MALICIOUS

PDF

44.8 KB Created: 2020-08-10 01:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96bd60f2ef81e8f3a0e8f2149c131a91 SHA-1: b1062fa9569ec9eaa37e07595039dc1eb19bd75a SHA-256: 41ccaa2e2c7db8177a1b9363bf8347bb8938f57fe240a761949b1a47b6443438
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms or redirectors. The primary malicious link identified is https://ttraff.ru/pify?keyword=impact+of+activity+based+learning+method+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to academic topics, likely intended to disguise the malicious intent of the embedded links. No scripts were extracted from this sample.

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.ru/pify?keyword=impact+of+activity+based+learning+method+pdf
    • http://files.wingwoodfarm.com/uploads/1/3/0/7/130738836/fe82b.pdf
    • http://files.bwm.life/uploads/1/3/2/6/132681783/kesujijoruximizamug.pdf
    • http://files.coronagoldensandgoldendoodles.com/uploads/1/3/1/1/131163927/77d8c55260.pdf
    • http://files.jenniecaseysinnott.com/uploads/1/3/0/8/130813997/67f26e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0446/0188/files/436350803.pdf
    • https://cdn.shopify.com/s/files/1/0437/1320/0282/files/.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/proyecto_de_investigacion_cuantitativa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/68949963243.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/oec_6800_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/under_dog_theme.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/zotupifiwokefalubataju.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/jukodiwasovimipugom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/85564624838.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/lezaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vololo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/command_prompt_shortcut_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/4528514392.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_off00006592.bin
504e90078ffadb6f01c4f8480783d000d6075fb97e2289b305fe54454b6efffb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6592 5808 bytes
font_01_sfnt_off00007930.bin
9623fb1d803dabda908944a8866f1624e6c557a38019e539b938bd9f199abc8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7930 14380 bytes