Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7c614d401d7d84…

MALICIOUS

PDF

82.4 KB Created: 2020-08-19 03:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28f89fafa186b43569a4b2833f91c721 SHA-1: 46e165098bf8770d253bb62a87569d74c1f29ed6 SHA-256: 0d7c614d401d7d84b8fb3e15713627bda62803e794e673c2e540c9d16ba7352c
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 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'free sat tv guide uk' and the malicious URL, suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

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/pify?keyword=free+sat+tv+guide+uk
    • http://files.cookingwithkelsey.com/uploads/1/3/1/3/131379554/9688119.pdf
    • http://files.waycross.tv/uploads/1/3/2/7/132712099/xopevevogofere.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3759/7607/files/84793075497.pdf
    • https://cdn.shopify.com/s/files/1/0431/2200/0029/files/9328673758.pdf
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/fallout_4_wasteland_survival_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/xesobodovegezuzijuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/bantu_education_act_interview.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/fugapagomadizufowir.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/58846452199.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/android_sdk_install_ubuntu_16._04.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/25204834099.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/tanatituse.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/9352868121.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.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_off000106b0.bin
419b08d28dfb11ffcc437036d8d6400c00366f3adc850d9bc8cf715639a227b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B0 5040 bytes
font_01_sfnt_off000117f1.bin
0eedcd1c87883ec847823c4698c1a448adae83ed459cedf8697aeb0d596680a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x117F1 10964 bytes