Malicious PDF — malware analysis report

Static analysis result for SHA-256 197947222da63380…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 11:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9c0fa74d09bf6efe9a32a2e66efedb6 SHA-1: 0ffcce424ff25876cccaec97240dd22cfb78ddd8 SHA-256: 197947222da63380a88ad249f4725e026ebc6a634600d18efe6cc8da08fd5060
174 Risk Score

Malware Insights

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

The PDF document impersonates a cloud document lure, directing users to click on links that lead to a redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=comics+reader+cbr+cbz+pdf+apk, which is known to host malicious content. The document also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation or to appear legitimate. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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/pify?keyword=comics+reader+cbr+cbz+pdf+apk
    • http://files.matthebert.net/uploads/1/3/2/6/132695401/gijaminoxowa.pdf
    • http://files.greerunderwood.com/uploads/1/3/0/7/130775032/5af072a865a21.pdf
    • http://files.websterandmarvelelectric.com/uploads/1/3/1/8/131871518/giget.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/79946976699.pdf
    • https://cdn.shopify.com/s/files/1/0446/6167/0051/files/bulats_reading_sample_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/57279366004.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/91004818480.pdf
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/51216505668.pdf
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/atom_and_molecules_class_9th_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/3978/4103/files/topimonejigekizawogas.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/watavotumutosusib.pdf
    • https://cdn.shopify.com/s/files/1/0440/6876/5861/files/system_admin_roles_and_responsibilities.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7113/files/tikufiwesogijogabaxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/nvm_meaning_in_text.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_off00006198.bin
bb56d0ea12328828d147b7b3778e61c57841ac510b2812c1126978b83ea8539d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6198 5428 bytes
font_01_sfnt_off000073fe.bin
6c894a294469c9e2737a2fc648d23b9009ad8361d44ba2acd7539d4724e75189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FE 10336 bytes

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