Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5d988c1b4c89e1…

MALICIOUS

PDF

63.6 KB Created: 2020-08-07 21:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20b464f61a3d1bbc817f48e1c241ffb1 SHA-1: ce1f2e77da175336f4e2c32437cf995300370bf9 SHA-256: 4f5d988c1b4c89e1dfd4d39152fb408e3d35d27eaf83076d47354d05a281e760
130 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, includes the same URL and a seemingly benign Shopify URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous external links, likely for SEO manipulation or to host further malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Heuristics 4

  • 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
  • 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=bsc+physics+syllabus+pdf+sambalpur+university
    • http://files.therustywagon.org/uploads/1/3/2/7/132710569/darot-widotifejebe-tedoval-fevapame.pdf
    • http://files.clearwaterlakemn.org/uploads/1/3/1/6/131606060/34dfd854c906da.pdf
    • http://lipis.mudgleyholidayhouse.com/uploads/1/3/1/4/131409090/dc5031365d2c1.pdf
    • http://files.thepointlessgrandma.co.uk/uploads/1/3/0/7/130738790/2cbfbe9f23a800.pdf
    • http://files.gaiacrystals.com/uploads/1/3/0/9/130968921/savemuzekalikog_susojewev.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/28300209798.pdf
    • https://cdn.shopify.com/s/files/1/0440/7423/8102/files/jomewidisefidarotagu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/35909019017.pdf
    • https://cdn.shopify.com/s/files/1/0439/6387/5486/files/hobby_electronics_projects.pdf
    • https://cdn.shopify.com/s/files/1/0435/5119/5299/files/taxudobarawa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/penusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/31857408718.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/85893311525.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/mamex.pdf
    • https://cdn.shopify.com/s/files/1/0436/2482/4995/files/60703542870.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/biology_question_paper_2020_state_board.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5546/files/xozimenawemox.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off0000e05d.bin
0e4bdbe77a9abe3bf0d37f70784d28731a0f8409d8c6321a88b2f8543d5bfbac		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE05D 3868 bytes
font_00_sfnt_off00007245.bin
4088a72d4f6a13c07bf06a7bf05883bb0eaebfd78b97d8ecd1e884f427522734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7245 5744 bytes
font_01_sfnt_off000085b2.bin
a0f5a8dfeaa0bb6dc0effbaf73f2996d6fa971a09dbb121d521afc971fdcd47e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B2 3204 bytes
font_02_sfnt_off000092a5.bin
5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A5 2320 bytes
font_03_sfnt_off00009cf8.bin
116a1d239f0b4dc002d2b5377067f8eed81c4de68a9610e88bee10e2759f2833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF8 14608 bytes
font_04_sfnt_off0000cad4.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD4 16224 bytes

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