Malicious PDF — malware analysis report

Static analysis result for SHA-256 8196e0bda03daf18…

MALICIOUS

PDF

40.7 KB Created: 2020-08-15 07:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b8885e7fba4214875795e838d0b731e SHA-1: 9d4a73085674e13cd3625f79475c9f0b7c6270f2 SHA-256: 8196e0bda03daf186da8b5e614f859a04e18a50073848ccc12f25e77f6448364
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at `https://ttraff.com/pify?keyword=expenditure+report+2017`. This suggests the document is designed to lead users to malicious content, likely for phishing or malware distribution. The presence of many Shopify links, some flagged as benign, may be an attempt to blend in with legitimate 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.com/pify?keyword=expenditure+report+2017
    • http://files.todorental.com/uploads/1/3/0/9/130969332/degus.pdf
    • http://files.cottonwoodcreekclothing.com/uploads/1/3/2/3/132302735/73a724bb95fc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2201/4885/files/tamil_news_paper_download_link.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/37747235847.pdf
    • https://cdn.shopify.com/s/files/1/0437/7994/8695/files/grade_7_maths_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/alto_sax_christmas_songs.pdf
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/81366566120.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6615/files/2775621277.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0487/files/74501941372.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/96055023268.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/37465691427.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/sajifonedaletapeke.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_off00006378.bin
a26764bc7ef9c28fa47f8183499b87973a5691576781da06897271863bc30d33
pdf-font-stream PDF embedded font (sfnt) at offset 0x6378 4964 bytes
font_01_sfnt_off00007480.bin
090aeb0248090768018816a4d4d794d40f5bcab4f4209f23b6429f8863224002
pdf-font-stream PDF embedded font (sfnt) at offset 0x7480 9980 bytes