Malicious PDF — malware analysis report

Static analysis result for SHA-256 333517438d096ca1…

MALICIOUS

PDF

49.6 KB Created: 2020-08-31 01:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f703a979a6a3ca4b24cf1efdc848b2da SHA-1: 78188222b13ba9a3890fb502589b38f338c8ea6e SHA-256: 333517438d096ca14852b45778cb146bfeb53a95a6b07a506b94e70e74d79e70
152 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector at `https://ttraff.com/wix?keyword=compare+and+contrast+inductive+and+d`. The document body, though heavily obfuscated, appears to be a lure related to academic topics, likely intended to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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/wix?keyword=compare+and+contrast+inductive+and+d
    • https://static.usrfiles.com/ugd/0e2875_b3b02e3b533c4e6183833c56695ff51f.pdf
    • https://static.usrfiles.com/ugd/b8c837_462a32b997ce4dbf8f8589a801444202.pdf
    • https://static.usrfiles.com/ugd/eb4c03_cdfed79f9bb849a981512b254e901a6a.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/fundamentos_psicologicos_del_aprendizaje.pdf
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/58352438299.pdf
    • https://cdn.shopify.com/s/files/1/0432/4933/6483/files/a_manual_of_acupuncture.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bumagigefabap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vevisip.pdf
    • https://cdn.shopify.com/s/files/1/0437/8496/2199/files/21385009736.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/pugopugapepidepegetam.pdf
    • https://static.usrfiles.com/ugd/10e3af_2d8b5f7ba2d04e3a987cbb7bc680941c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0db1f00b79c2431a8e8f83ebf3afcfaa.pdf
    • https://static.usrfiles.com/ugd/8b49c6_d5566d6b45284f3380584f60aa76f76b.pdf
    • https://static.usrfiles.com/ugd/6c98bc_0138271b235042b8ba994aa2809dbc9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b85ed15068ba4997ba7323f1e4302bd5.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_off000085bb.bin
411d74d24fc06d1a7cc7319bff8963ae2fd5060ab3d362712366d16d0f13df87
pdf-font-stream PDF embedded font (sfnt) at offset 0x85BB 5152 bytes
font_01_sfnt_off00009724.bin
5642cdc17487e934e3a9178722435710be27b3d92b8a06ebc6bc9af116802682
pdf-font-stream PDF embedded font (sfnt) at offset 0x9724 10076 bytes