Malicious PDF — malware analysis report

Static analysis result for SHA-256 895c3a8c27b0f35c…

MALICIOUS

PDF

50.6 KB Created: 2020-08-06 06:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b3761874c81ecf6cd085a0e10bca82a SHA-1: bfa0f7e7f6690c288ea8714e3235d1008d6b6b07 SHA-256: 895c3a8c27b0f35c6e2b4e2d74754adb3a214f43a247d70b9c8d2549270fe69e
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a malicious redirector link disguised as a free download for 'English questions and answers pdf free download'. This link points to ttraff.ru, which is known malicious infrastructure. The document also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve the ranking of the malicious link. The presence of a visual download button further supports the lure.

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=english+questions+and+answers+pdf+free+download
    • http://files.theolneygroup.org/uploads/1/3/0/8/130814132/4684358.pdf
    • http://files.cejdentalaccountants.co.uk/uploads/1/3/0/7/130775853/winuve.pdf
    • http://files.binnsqualitymeats.com/uploads/1/3/0/8/130874154/4fcf5b.pdf
    • http://files.evemarieshahoian.com/uploads/1/3/1/3/131398504/2015596.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/38257369474.pdf
    • https://cdn.shopify.com/s/files/1/0437/1863/9765/files/lion_king_circle_of_life_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/313075025.pdf
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/76355261922.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/zovalutobosima.pdf
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/47536513216.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/75311035183.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7894/files/begatimipuburuwawenulapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/xidavakojiredo.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_off00007582.bin
3207e48d73e5f242ddfb435efbab763d95040d234f7b694ee6f6760b054f4783
pdf-font-stream PDF embedded font (sfnt) at offset 0x7582 5360 bytes
font_01_sfnt_off000087be.bin
25a70c72fb96d38e9a8f892d22374d7be688324cebc1ac89a130cdbfe98d5d64
pdf-font-stream PDF embedded font (sfnt) at offset 0x87BE 12160 bytes
font_02_sfnt_off0000aef1.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF1 4324 bytes