Malicious PDF — malware analysis report

Static analysis result for SHA-256 866a8f0483266e4a…

MALICIOUS

PDF

49.4 KB Created: 2020-08-27 22:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7878c50c7ea0d571719a484fc18b9298 SHA-1: c3b30428e14e0116abb2d8541c2091c296c51806 SHA-256: 866a8f0483266e4ad09edb4199b2607a4940175eb1cdd62a9c75ef995f10aab6
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=adobe+premiere+cc+2014+download+free', suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern. While no scripts were extracted, the overall structure and link analysis indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=adobe+premiere+cc+2014+download+free
    • http://sinabulok.newleafclubhouse.com/uploads/1/3/1/8/131856543/12c62ad338.pdf
    • http://bosagano.lifebyyoga.com/uploads/1/3/0/7/130776487/sujojakawositek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/assistant_commandant_recruitment_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
    • https://cdn.shopify.com/s/files/1/0438/4007/7981/files/nawiwefuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6797/files/14369989957.pdf
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/gokodofovugururulagig.pdf
    • https://cdn.shopify.com/s/files/1/0429/1998/5319/files/73351683282.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/90989732812.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/fusionner_plusieurs_en_un_seul_avec_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0428/3174/1095/files/36211505081.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000745a.bin
57ba67069e906520b9700f82c493f2a5ff94e21e230866e8708b82a392a7565e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745A 5464 bytes
font_01_sfnt_off000086db.bin
b07a369193a061cc527139c6d88afb2089cfb7eb51eb296c7a16a4912b97a400		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86DB 10480 bytes
font_02_sfnt_off0000aaca.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAACA 4324 bytes

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