Malicious PDF — malware analysis report

Static analysis result for SHA-256 22553c2591081a78…

MALICIOUS

PDF

41.2 KB Created: 2020-09-09 07:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4ed89093b9112cb5b644b4364b59160 SHA-1: 6eb57f32741203b0731310a37160d52d20d4dab5 SHA-256: 22553c2591081a780582ae36b48a2c73a94ab7fcd2ac23e32df7251892d9301f
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a large number of embedded links. One of these links, https://ttraff.me/pify?keyword=bestimmter+unbestimmter+artikel+daf+pdf, points to a known malicious redirector. The document appears to be a link farm designed to direct users to potentially harmful websites.

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/pify?keyword=bestimmter+unbestimmter+artikel+daf+pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/83917747393.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/91608504342.pdf
    • https://cdn.shopify.com/s/files/1/0463/2749/6859/files/vehicle_dynamics_stability_and_contr.pdf
    • https://cdn.shopify.com/s/files/1/0436/9950/3254/files/legag.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7725/files/tekegulisiwuxebon.pdf
    • https://static.usrfiles.com/ugd/0582e0_1660ddb5346b47668141011b232eca05.pdf
    • https://static.usrfiles.com/ugd/fd3290_f5ba36f54d4a44ca869cc01679b9caf6.pdf
    • https://static.usrfiles.com/ugd/18ee90_9d19fa35035e43249851d229cf30ca6a.pdf
    • https://static.usrfiles.com/ugd/63022f_d1d7bca4d820405487d5b36d959db5db.pdf
    • https://static.usrfiles.com/ugd/7c30af_c3f899269e9e4fbca0fb0128ea72ea2f.pdf
    • https://static.usrfiles.com/ugd/ed2d23_4091aa861e774d23a08a697d66387e0e.pdf
    • https://static.usrfiles.com/ugd/95ea6b_b7e30590c1ba47e3baf02a1d6e788267.pdf
    • https://static.usrfiles.com/ugd/a13bc2_09ff904e221c455387e4868d655f7003.pdf
    • https://static.usrfiles.com/ugd/35c6e2_54db33e908114289a67222d8412aa3bf.pdf
    • https://static.usrfiles.com/ugd/b3bc21_1f1efb0c66b04fc4b8446889e2c0b9d6.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f89.bin
f16746552cf42f76a984521e191f0ca6adb86f9f886f8ee9a1f3374d96311c20
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F89 5440 bytes
font_01_sfnt_off000071f1.bin
c45dcffac00a7a90939455ad878232e781cc5a4849a392a0bd32a0f608a47f5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x71F1 11208 bytes