Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee187e00de12d24…

MALICIOUS

PDF

40.5 KB Created: 2020-09-12 12:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47975dedbdeb7c300d5fda20c62fc183 SHA-1: 2fc2fa806341bc6620f1d9bd4e423042cfd64237 SHA-256: 7ee187e00de12d242673a81ba0c6228531248beeff5b13d3d5a289153ccca648
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including a critical redirector link to 'ttraff.club', which is flagged as malicious. The document body, though heavily obfuscated, contains text related to a 'labour contract template' and the malicious URL, suggesting a phishing or scam attempt. The presence of many external PDF links indicates a link farm, likely for SEO manipulation or to host further malicious content.

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.club/wix?keyword=labour+contract+template
    • http://files.ashlandeducationfund.org/uploads/1/3/1/3/131382092/4938380.pdf
    • http://files.hnpsiteplan.com/uploads/1/3/1/4/131407492/9615504.pdf
    • http://files.greenvalleygrowers.com/uploads/1/3/2/8/132816091/zawarivojowiwexumose.pdf
    • http://files.chseducationfoundation.org/uploads/1/3/1/4/131453733/romefozatavusa-kopoxovinesa-lurowe-birubizajateme.pdf
    • http://files.armelleaurelien2019.com/uploads/1/3/0/7/130776511/fejan_gumuwekaz_safesifoxife_dutev.pdf
    • http://mosisof.desythai.com/uploads/1/3/1/4/131437693/9220286.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a48928_4920df726732418c889ed4a54a0aea37.pdf
    • https://static.usrfiles.com/ugd/4d548e_18dae2b8c8d041018e70b83686154ed6.pdf
    • https://static.usrfiles.com/ugd/2a1429_b32a9dc857094fbcbbe73c644e5a5be7.pdf
    • https://static.usrfiles.com/ugd/3eed2b_cb9c80c282f54d118ec4ee8df34416d6.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/o_reilly_safari.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91337380597.pdf
    • https://cdn.shopify.com/s/files/1/0433/0828/6105/files/barcode_39_generator_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/patulovewenagibi.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_off000061b8.bin
4a7ea48cd4b1a459fc90197a6b94cc4e899ed73f9ea3d2ad28f493bf59ae26b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x61B8 4980 bytes
font_01_sfnt_off00007291.bin
c0f4ff181c23af58d9455b936918c18d8f37dc38fd89d4ba91ea86cb4e292146
pdf-font-stream PDF embedded font (sfnt) at offset 0x7291 10136 bytes