Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c6d99b551fd67b…

MALICIOUS

PDF

117.4 KB Created: 2020-07-29 00:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc7bd65ca47709d807c56b10bdc58e59 SHA-1: 6894e6124969b805a6300df5d9940c22d1210904 SHA-256: 03c6d99b551fd67b075f048a20ebc628627f561070bf1ccec5cc81f92336cc54
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to PDF files hosted on Shopify, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. While no scripts were extracted, the presence of numerous external links and the ML classifier's high confidence indicate malicious intent, likely to redirect users to harmful content or phishing sites.

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=canonization+of+the+bible+pdf
    • http://files.beavermountainadventures.com/uploads/1/3/1/4/131407102/ab868aee32578ac.pdf
    • http://files.doitforthemems.com/uploads/1/3/1/4/131455543/kelulakutifore_limisalul_develunot_jurijigenigoje.pdf
    • http://files.dbodigitalmarketing.com/uploads/1/3/1/4/131406717/e5f21350eb04b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/genuzomilegofuxosemopix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.pdf
    • https://cdn.shopify.com/s/files/1/0437/6274/5501/files/tonuzam.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/lejuzejasazopan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasukeseduvemuledup.pdf
    • https://cdn.shopify.com/s/files/1/0430/8579/1393/files/9114462886.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7014/files/xakunaxumotizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9076/files/lagimasagaduli.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/25441795897.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/17142138142.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5805/files/kogunulur.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://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014c85.bin
ed2304f3c046b464b230fd5ffa90a743f69d07e9ba70f5945ce1b97508ae8659		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C85 8748 bytes
font_01_sfnt_off0001638f.bin
afbd6f33929aba06a1c7b5c024ef3e39a32fa9753bc98fedc1777e2462ab5649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1638F 4856 bytes
font_02_sfnt_off0001740f.bin
5639392d1846592d8d93bd35982ed5e1cb4b51548fbbb68c1d7c62c539113f4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1740F 19468 bytes
font_03_sfnt_off0001af61.bin
1fd6f5b10873e0c0ae69bf64627669bf1b986ea21871434e30c94a926d9aaed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF61 16916 bytes

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