Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abeaf4d47a1e108…

MALICIOUS

PDF

46.2 KB Created: 2020-09-17 14:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbb29ea2d5ddec98eb513cd426ff62ec SHA-1: b16b15aabf302b951a82946961e0c386b5ac4fa1 SHA-256: 2abeaf4d47a1e10893956807c01c1de5c4597079fdb231bfe115d9f6319c2a3a
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on benign Shopify domains but are likely part of a link farm to improve SEO for malicious content. One critical heuristic identified a link to a known malicious redirector, 'ttraff.me', which leads to a download for a 'portal knights mod apk free download'. This suggests the PDF is being used as a lure to distribute potentially unwanted or malicious software. 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.me/wix?keyword=portal+knights+mod+apk+free+download
    • http://files.remus-emsermann-lab.org/uploads/1/3/0/8/130813409/buzakofefi_vovokepulij.pdf
    • http://files.christislifeministry.org/uploads/1/3/1/6/131606965/lolikun_xevidagud_tojojuxuposo.pdf
    • http://gaguxamep.fleurspressed.com/uploads/1/3/2/6/132696067/4703236.pdf
    • https://78f4935c-f2b4-4b22-9
    • https://cdn.shopify.com/s/files/1/0436/2895/3763/files/r_select_columns_by_name.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/62698527002.pdf
    • https://cdn.shopify.com/s/files/1/0482/8577/8081/files/wavofabakuze.pdf
    • https://96ae3ede-bf9f-4dfe-9d32-7bc7c224eafb.filesusr.com/ugd/930050_de83b89bf340488293eb7f204c0f1142.pdf?index=true
    • https://c0a1b152-0d4b-4813-abd3-5767b7d5a02e.filesusr.com/ugd/ef0078_b1c10c3f3d0a40a39a8d559ba0042589.pdf?index=true
    • https://3a199c54-afdc-4d94-a24b-a381dad6d680.filesusr.com/ugd/8a5fcf_479454dc1e144a218fdbfa4bafbe268a.pdf?index=true
    • https://78f4935c-f2b4-4b22-9609-76a94b4b1c05.filesusr.com/ugd/8a4248_0e074ba712cd45348bd489113f607c9d.pdf?index=true
    • https://fddd2d5c-8f96-4ad7-a350-0c8db66c8aef.filesusr.com/ugd/f08e01_f61900ea8943439e84d7fdd4c0fe8109.pdf?index=true
    • https://728cc3d3-4f38-4ba4-b804-b0cfe4371108.filesusr.com/ugd/b7ab08_60788ec7aeb54e3bb0a8892dea3bfbf5.pdf?index=true
    • https://c1af206c-88e1-4d68-bfa7-8893e2847977.filesusr.com/ugd/11b39a_c232efb1c5354b788e339ec4075a2dee.pdf?index=true
    • https://1dde60d3-18cc-4e99-aa79-5fd0a3ac1eae.filesusr.com/ugd/105a8c_e903be6f6a6e4065ae94f51d3e20e891.pdf?index=true
    • https://a3f42ee2-aeaa-41cb-9242-95e2b0dad712.filesusr.com/ugd/1e533a_9b5f523bb00e4f098f1690d9720ba00f.pdf?index=true
    • https://7e7a802b-62c8-432f-ab16-f38d8784e299.filesusr.com/ugd/787b0a_2fa767a8512442a38923be5403e96d2c.pdf?index=true
    • 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_off000069da.bin
619a44e8b5c2a2d3fc0e18259d8022938ad4f8b30552901bc68dc41c3d0f2ef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DA 2880 bytes
font_01_sfnt_off00007418.bin
21737c0ae919aca70ae58f62c2dd7f1f0f04c2eebdcaf0f482399f0097452531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7418 5612 bytes
font_02_sfnt_off00008716.bin
5cdad096b431f21773048aff915656266ca726f5c6412b688c5ec7bb01906ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8716 10500 bytes

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