Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef6904c4dcc845a…

MALICIOUS

PDF

40.0 KB Created: 2020-08-15 07:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a92b5a3b2b508d4240eadf5e6e62b7b2 SHA-1: a0f0e3089cc7db97386336d87544ec63474a3764 SHA-256: 0ef6904c4dcc845ae9699998d6293fbed37499a32540da3e833ce3810d1dffd6
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=lease+agreement+template+philippines'. This indicates a phishing or scam attempt, likely using the 'lease agreement' lure to entice clicks. The presence of many Shopify links suggests an attempt to blend in with legitimate content or to host secondary payloads. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=lease+agreement+template+philippines
    • http://files.grapetelevision.com/uploads/1/3/1/4/131438114/5c6f6f6df5afe.pdf
    • http://files.christianleigh.co.uk/uploads/1/3/0/7/130739081/nikunidum.pdf
    • http://files.realtimecases.org/uploads/1/3/2/6/132695329/padofujujidalezo.pdf
    • http://files.4-ucorp.com/uploads/1/3/0/7/130739567/7385382.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/95128738557.pdf
    • https://cdn.shopify.com/s/files/1/0432/6984/9246/files/41070924258.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/sopisabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/29828320186.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/2014_jeep_grand_cherokee_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/factors_affecting_academic_performance_of_students_in_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/application_for_citizenship_certificate_canada.pdf
    • https://cdn.shopify.com/s/files/1/0429/1444/7519/files/acceptance_letter_format.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_off0000615f.bin
e82b6129cf1c8c268b0e1f1dc627d13a17e3d69d3bde8a1dd297bd49f894078a
pdf-font-stream PDF embedded font (sfnt) at offset 0x615F 5176 bytes
font_01_sfnt_off000072cc.bin
4bfa3789117a1d074c4755381bc2d947068c3c2b62bba8c769bb0d9a93f3949f
pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 9532 bytes