Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d74172c13c3b8f9…

MALICIOUS

PDF

40.2 KB Created: 2020-08-31 05:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5127e354c0583683567d6f8a40290e56 SHA-1: 7571ad00b401830e713d2d9a19af31a325289827 SHA-256: 5d74172c13c3b8f92847a31d572796e4c8ef3e1c1591134b62df9b1fd1b86c53
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, a common tactic for SEO link farms and phishing. The primary malicious URL, 'https://ttraff.ru/wix?keyword=presto+auto+loans+mesa', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains keywords related to loans, suggesting a lure to a phishing or scam page.

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.ru/wix?keyword=presto+auto+loans+mesa
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_281e734dd9934f03bbd40e4afd39e7fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_db36a262cf0345a29e1921386e480fe3.pdf
    • https://static.usrfiles.com/ugd/353d00_7921d81b9a7f426cace95f1fa1022981.pdf
    • https://static.usrfiles.com/ugd/89c6ad_577e1f253d504778a464367df91ab40c.pdf
    • https://static.usrfiles.com/ugd/cdb50c_eb21a3fcb6f64daca6b2f010bcaf8678.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ff37e4a526f42fd805e670bfd6c74ac.pdf
    • https://static.usrfiles.com/ugd/9cb927_ac7eb192acfa4bdc995ac7bd287e7f41.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9989/files/tepaterimobugon.pdf
    • https://cdn.shopify.com/s/files/1/0429/3669/6999/files/uclh_cqc_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83971047952.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1903/files/list_of_nouns_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/1917/3031/files/pajoxinonipi.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2546309d7804e758f46913a9e004d56.pdf
    • https://static.usrfiles.com/ugd/8b9728_228db1c2cdff47f482dcaad49ab225cf.pdf
    • https://static.usrfiles.com/ugd/003b86_bfa18f8d4ecd4a7999330917b5cff668.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f02.bin
3908957f6681eb4af5b9b768d19d8046a6f30843cbd77c14e16f0836a90f5a8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F02 4832 bytes
font_01_sfnt_off00006f4e.bin
d23b856d4dfd2538bf13d9b831724ab49d2c25c3f1a96432eac2f76816e134aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4E 10996 bytes