Malicious PDF — malware analysis report

Static analysis result for SHA-256 2911fa0b21683c9e…

MALICIOUS

PDF

36.6 KB Created: 2020-08-06 11:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a405f0b3867e7fc28332ddd0cb58244 SHA-1: 7a5e0e3a8fafe300fc60d6969f518786db9f1dfa SHA-256: 2911fa0b21683c9eab493c070b742eca20dd3fb468803df0f7799a519e2f6dd3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a link farm designed to lure users into downloading content under the guise of free educational materials. The primary malicious link, https://ttraff.ru/pify?keyword=cambridge+primary+mathematics+learner+s+book+5+pdf+free+download, redirects to potentially harmful infrastructure. The document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

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=cambridge+primary+mathematics+learner+s+book+5+pdf+free+download
    • http://files.davehickson.net/uploads/1/3/2/3/132303239/171c61f.pdf
    • http://lafib.pinebowerbc.org/uploads/1/3/1/4/131407995/vojiwotulelebovetum.pdf
    • http://files.statebirdtogo.com/uploads/1/3/2/7/132710687/a1b067.pdf
    • http://xowobani.earthcraftpermaculture.com/uploads/1/3/1/3/131380345/bawujivajodazojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/72511965333.pdf
    • https://cdn.shopify.com/s/files/1/0439/4795/0248/files/types_of_antihypertensive_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/linupuzafovokavesis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/5th_edition_monster_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/fantasia_models_mya.pdf
    • https://cdn.shopify.com/s/files/1/0435/6436/8021/files/troybilt_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3863/files/vejitaropoxeko.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/59772901578.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/84682244146.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/75973117591.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_off00004f2b.bin
143ff4a43cf959b4c6ad48ffbaefa49a25a66b64a1cdda09ccaa4b3e0377a957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F2B 5996 bytes
font_01_sfnt_off00006379.bin
060a31edbce75da8fa8e071aca97e3e956d47f23ab10fde2bee23bf27a3cf18c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6379 9904 bytes

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