Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b6ee7f91413d69…

MALICIOUS

PDF

51.3 KB Created: 2020-08-07 21:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae0ee54fa48387de8daa65fd67bb52f SHA-1: ac4fe0ff67f6d510759506cfccb356e351765f67 SHA-256: a1b6ee7f91413d69c3d08d27b756682e659a1574620a643fa02e125de4662eb3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL, indicating it's the primary lure. No scripts were extracted, but the presence of the malicious redirector and the link farm strategy 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.cc/pify?keyword=class+10+physics+light+reflection+and+refraction+numericals+pdf
    • http://files.teamfitnessandfun.com/uploads/1/3/2/8/132815190/wafanitulono-tilimine-zupabo-sidarenes.pdf
    • http://files.phsgolf.net/uploads/1/3/1/4/131408344/xaxuz-deriwu-babelivojati-wovezobulu.pdf
    • http://files.hendersonbrothers.ca/uploads/1/3/0/7/130775172/3896565.pdf
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/subspace_bubble_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/sipumano.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/calculus_3_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0655/files/jeppesen_pacific_airway_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/0517/4179/files/criteria_for_judging_dance_contest.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/rolan.pdf
    • https://cdn.shopify.com/s/files/1/0437/0356/6486/files/miwikapel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51851907441.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9304/files/xajovexukuxuveli.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3907/files/zisodorugukedunoxebuvitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/48990763308.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000721e.bin
cbda5d7d5c41bb0127eec4ae874caa7aa4349a1aade175054594e890b91897e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x721E 5768 bytes
font_01_sfnt_off000085a5.bin
4c24637ce8f0e4483fdbec5bf5054e00f0b084e6f18afdf5565bd5362be42ada
pdf-font-stream PDF embedded font (sfnt) at offset 0x85A5 10888 bytes
font_02_sfnt_off0000aaca.bin
4ce97752c8d1ed0b0302a1507788019c6b738cc3ee96ca273f61f92c287db7cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xAACA 16072 bytes