Malicious PDF — malware analysis report

Static analysis result for SHA-256 2275ddc6c23be861…

MALICIOUS

PDF

33.1 KB Created: 2020-08-31 08:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4f3c57d5bcee5782b342da915bff6b4 SHA-1: eaf0944a527801f259f084ff609608cea78f9ebf SHA-256: 2275ddc6c23be8614786df214198d22597ac1369b7481809ecae5250eab798de
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links, many pointing to a redirector service. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.me/wix?keyword=obr2+ionic+or+covalent'. Another heuristic indicates a PDF link farm, with the first URL being 'https://static.usrfiles.com/ugd/d4da64_0c59f2c3ecf64b6e86dd09c9162ca279.pdf'. The document body contains garbled text but includes the malicious URL, suggesting a lure to redirect users to potentially harmful content.

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=obr2+ionic+or+covalent
    • https://static.usrfiles.com/ugd/d4da64_0c59f2c3ecf64b6e86dd09c9162ca279.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d928d30a28b4f8c87529791b03cfff4.pdf
    • https://static.usrfiles.com/ugd/9b5f63_89517231a45f48039b992f925632a83c.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7918/files/iterate_through_object_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0435/8805/9293/files/you_are_holy_prince_of_peace.pdf
    • https://cdn.shopify.com/s/files/1/0436/7794/1913/files/game_of_thrones_7_temporada_assistir_online.pdf
    • https://static.usrfiles.com/ugd/b5472a_fd60b470bcbe40739c4d27d53e9fa094.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1b09fe3458b4864bedc3aacab44d508.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_a202282588d942d595aa2cda2bc5e492.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_67ce84a234a64de9876ac3c5f1d35a1b.pdf
    • https://static.usrfiles.com/ugd/e73fea_b88755330fb0422d9c213c54230adfbc.pdf
    • https://static.usrfiles.com/ugd/89c6ad_e001cab8a49c4a22bc15708fbcc04a00.pdf
    • https://static.usrfiles.com/ugd/a86d68_a9314625e9e44c89a4c227e65b1db36e.pdf
    • https://static.usrfiles.com/ugd/2c608b_b7475ee142554781bd7f9b223b925489.pdf
    • https://static.usrfiles.com/ugd/b13fd1_d24c01e1b298477eb001b4eba7afb8f1.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_off000043bd.bin
5ddd34bcbbc59180debc11bed8a9b922bccecff77d6d3fc6ec97db20b7423742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43BD 4972 bytes
font_01_sfnt_off000054b1.bin
e185c2aa8c70ebc6539200d58a46293342eb5bae44dff7858ecf1902bf6c7bc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B1 10532 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.