Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0f8e11dd28e926…

MALICIOUS

PDF

55.1 KB Created: 2020-09-16 18:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e7484cb3794666e8016787039df9513 SHA-1: 6f1314c906fe19f866791e3abccf5940ba1d5114 SHA-256: ac0f8e11dd28e9262e31ed600adba976bf7e1083ccc2c7a93b1c9dd89126245a
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to create a link farm. One critical heuristic identified a link to a known malicious redirector at 'ttraff.me', which is likely the primary malicious payload delivery mechanism. The document body text and embedded URLs suggest a lure related to 'google drive unblocked movies mp4' to entice clicks on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=google+drive+unblocked+movies+mp4
    • http://files.tangoyoung.com/uploads/1/3/2/6/132682882/7421352.pdf
    • https://cdn.shopify.com/s/files/1/0429/3096/2588/files/popimibasosazuvo.pdf
    • https://cdn.shopify.com/s/files/1/0440/0503/2086/files/75875668436.pdf
    • https://cdn.shopify.com/s/files/1/0469/0427/9202/files/absorption_and_variable_costing_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/6129/6790/files/lovosoduta.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/86218209657.pdf
    • https://cdn.shopify.com/s/files/1/0432/8177/6795/files/colors_tv_hd_video.pdf
    • https://cdn.shopify.com/s/files/1/0430/9785/0017/files/gedaluware.pdf
    • https://577710b0-f715-472d-b535-25e68a2a0003.filesusr.com/ugd/8ce377_498a1fa7d3c34ca69b15572061bf6625.pdf?index=true
    • https://04cdd993-ef3a-4bb3-9d33-2fd91c7f3a6c.filesusr.com/ugd/d2751c_550deb8f988b49f6b52b23ca521b200c.pdf?index=true
    • https://8cff560a-8894-4161-bce6-e1f06dc1252f.filesusr.com/ugd/a91264_c27054cb03974c46883ba1a0633f9743.pdf?index=true
    • 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_off000075e8.bin
e420ea91164879677a5d716f1716c8fd21b889812201adc34531f98dacdd0b05
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 6012 bytes
font_01_sfnt_off00008a74.bin
8afda2dd6205646a3cc3018dddd0138a311cebfe2b45b9aa7a263ae8ab753aed
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A74 5568 bytes
font_02_sfnt_off00009d60.bin
9203c589e2b8cf4a8a5494046f5de6930a3819c8504867336d6ef94f02f0ef41
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D60 15668 bytes