Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfda40d697af9d71…

MALICIOUS

PDF

36.2 KB Created: 2020-09-01 06:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18acc4ed5a99a63de8b40a03f0fa8a56 SHA-1: 80da74b48ea123c2122f2ff667115c2178ed1e98 SHA-256: bfda40d697af9d711b4381427c1f36974b2d8d827fa4f78d3be0a027353ba9c9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a search result for a popular song. This suggests a phishing or scam attempt to lure users to malicious content. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted from this sample.

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.cc/wix?keyword=aadat+tu+meri+punjabi+song++pagalworld
    • https://cdn.shopify.com/s/files/1/0437/5710/9399/files/zip_folder_linux.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6672/files/lufavobuvega.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/amaras_al_seor_tu_dios_amedeo_cencini_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0440/6840/5413/files/89139109399.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/sisazodusome.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/nexaramidolototajufure.pdf
    • https://cdn.shopify.com/s/files/1/0430/5420/3031/files/10th_tamil_book_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/barbara_oakley_a_mind_for_numbers.pdf
    • https://static.usrfiles.com/ugd/fa6f14_340dbc28e7374838a6b740b8f8137950.pdf
    • https://static.usrfiles.com/ugd/b8c837_a23b6ba8c2334f3d8b7f48d618d097d6.pdf
    • https://static.usrfiles.com/ugd/963627_3a34ea29b8f2457b9f949f39f4dc6600.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_1527cc11b89044d09054d3d8f9776649.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000042e4.bin
53cc33141d064d7a556a58c8d9f839ac9e2c99626e6f9959acd5de8749d11258
pdf-font-stream PDF embedded font (sfnt) at offset 0x42E4 5460 bytes
font_01_sfnt_off0000555f.bin
062f8aef8065f1f1d3a9b379b56a633edb791cbb68884bc168094fdddd7964ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x555F 9520 bytes
font_02_sfnt_off000075fd.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x75FD 4324 bytes