Malicious PDF — malware analysis report

Static analysis result for SHA-256 a633df85a7662340…

MALICIOUS

PDF

49.2 KB Created: 2020-08-08 12:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 706c48e88ae267a1f27f4929ca066d4d SHA-1: 894de2be6e3d484a734d1ed25e96f0030d5179c8 SHA-256: a633df85a76623405a61e1c4a325d7e1a9e4cf1ca2aa58e429a42146b4504f86
128 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, ttraff.ru, which is flagged as malicious. Additionally, it hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or traffic redirection. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The document body, though heavily obfuscated, contains the malicious URL.

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.ru/pify?keyword=java+programming+language+pdf+in+urdu+free+download
    • http://files.recreatednow.com/uploads/1/3/2/8/132814933/9359141.pdf
    • http://pemaz.claystories.com.au/uploads/1/3/1/4/131407406/9550413.pdf
    • http://files.familypracticecenterofnewtown.com/uploads/1/3/1/4/131438461/nezaxibiba-ganam-tebenadatijogub-liwutanapiz.pdf
    • http://files.it-ninja.nl/uploads/1/3/1/4/131452991/9511649.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/bijawevar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lipowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/gekegarijoki.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/13546624489.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/keninar.pdf
    • https://cdn.shopify.com/s/files/1/0437/9957/6733/files/5087424479.pdf
    • https://cdn.shopify.com/s/files/1/0437/8876/3298/files/canon_in_d_violin_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7576/3353/files/16348116442.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8263/files/balanced_scorecard_strategy_for_dummies._download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/vivewevurujejoliwugeferem.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/
    • https://cdn.shopify.com/s/files/1/0428/56

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008198.bin
86422f971f7e2daf3a38fd04a40a7ed043db92ea4ab6712d9ddc1a3f083a8349
pdf-font-stream PDF embedded font (sfnt) at offset 0x8198 5324 bytes
font_01_sfnt_off000093bb.bin
63ea402c896e9c8ce2bbe19dccbbbde275cf0a755be8ec6c816c3ca0954e6a78
pdf-font-stream PDF embedded font (sfnt) at offset 0x93BB 10316 bytes