Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5925c4fcebe6ed…

MALICIOUS

PDF

58.5 KB Created: 2020-09-01 04:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01c3981c4b8587317a3b35551bf5fdcb SHA-1: d938514a955fde869dca322e12b1ebb8d8c78695 SHA-256: 6d5925c4fcebe6edc1eefaeb2cc48ab711bbc1ec47770bc3989f34258e57f463
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates the PDF is part of a larger network of linked documents, likely for SEO manipulation to drive traffic to malicious sites. The ML classifier strongly suggests malicious intent.

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.cc/wix?keyword=standard+thread+size+chart+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a7d1e08b2b22426390614c8d885f4e7b.pdf
    • https://static.usrfiles.com/ugd/1c90dc_09970e8af6e548959447fc03cc9cbb24.pdf
    • https://static.usrfiles.com/ugd/9421c8_4299ed6b238d44879f4527cb9a7fd32c.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb28dda2c08d462290a8804f671fe9d8.pdf
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/litukunowefe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2536/files/11509209845.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/52295016785.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/shockwave_daily_diff.pdf
    • https://static.usrfiles.com/ugd/0f1814_8af9c68ebf734f4d9ce008c2c61c909e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0893b9117fc24951aa6f7b0ce4139260.pdf
    • https://static.usrfiles.com/ugd/d775a9_454eea97e2db4b47be124a54a58b57dc.pdf
    • https://static.usrfiles.com/ugd/286fb8_efd9e67f31f846eaa977098e76e79591.pdf
    • https://static.usrfiles.com/ugd/b65acf_a665fa6c1bd642d6a3490ccfe4fced2c.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/amaron_car_battery_price_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/61721900682.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000820d.bin
75de1c8da3e18904868d125b9eed5cb24a513916bb27eba0568608ffc730988f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x820D 5364 bytes
font_01_sfnt_off00009451.bin
4f2a6d288f361d37f167e2d30a3b4083508b07d3c06c5d786798ed4dd257348b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9451 16448 bytes
font_02_sfnt_off0000c7d6.bin
77905ff9885e60cfff17cf33ad9da418757c231635603c6b4cc239c84c233917		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D6 16064 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.