Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a09a41f255b5d1…

MALICIOUS

PDF

44.7 KB Created: 2020-08-19 03:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3676c3fc7a66c207638d110f3b0043c2 SHA-1: 005049e412b7b27d0ce5acfafa896bfd895551a1 SHA-256: e6a09a41f255b5d1de43b257d06b55c987dc3f8d5bd39c9f9ebe67384a2638e8
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for users to download further malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector URL is sufficient to classify the attack pattern.

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.com/pify?keyword=basecamp+manual+pdf
    • http://dozulik.iconicplumbingtx.com/uploads/1/3/0/8/130814328/dogiso.pdf
    • http://files.cgfcjesusislord.org/uploads/1/3/1/0/131069934/5500180.pdf
    • https://cdn.shopify.com/s/files/1/0449/3810/0891/files/69104647026.pdf
    • https://cdn.shopify.com/s/files/1/0432/6909/5590/files/creative_writing_teaching_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/85326360080.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/gagogubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/27217880310.pdf
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/witovelefomozokirif.pdf
    • https://cdn.shopify.com/s/files/1/0431/6446/7357/files/deep_purple_lazy_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0439/9765/9294/files/2001_ford_ranger_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/2621/7120/files/65352085767.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4602/files/velemutugukikiritasasak.pdf
    • https://cdn.shopify.com/s/files/1/0439/3821/8152/files/cub_scout_bear_leader_handbook.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_off0000622c.bin
6aa4b4a46b9e38a02990f0ae9a2256fad804af76cf47ed99aaee3988f78fe6c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x622C 4900 bytes
font_01_sfnt_off000072b9.bin
5b2f984a48436f92fc24d5d539ebc9575d2cca2522d024b8fa6af47ded701d27
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B9 10684 bytes
font_02_sfnt_off000096cc.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x96CC 4324 bytes