Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d4e29e242d0087…

MALICIOUS

PDF

39.1 KB Created: 2020-08-29 12:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 082caa1567e251706850a33f75f92dd4 SHA-1: 5aead04c24d2f7f25069e377cb838f921dd5cffb SHA-256: 26d4e29e242d00879330551eb71e4da9371aae8211f104c833de3c9aad8336a9
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the URL that triggers the malicious redirector. This suggests a phishing or scam attempt designed to lead users to 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.cc/wix?keyword=creating+apps+in+kivy+mobile+with+python+dusty+phillips+pdf
    • https://static.usrfiles.com/ugd/b8c837_984aba8673e94f28b01643f7eb643778.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ab8d2e2da394f6191214d53b1402e32.pdf
    • https://static.usrfiles.com/ugd/b8c837_3999fb05c3bf448d8adbba81ce1d73e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b3bd44c3eb94a4f8ee3af58f267030a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3da18023befa43ed9d4ec3fe143e4c6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_685bba00e4ab4db9b3a08a512e85b923.pdf
    • https://static.usrfiles.com/ugd/b8c837_a60104e521124fb1bae5ac2a736543af.pdf
    • https://static.usrfiles.com/ugd/b8c837_48cf34bcc8344ce7b2b7ad903e84a5ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4abdd563b084907801b7395f72b7dc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd08ae67a8f149e0b08ce56369bc4199.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9642/files/look_again_formal_dresses.pdf
    • https://cdn.shopify.com/s/files/1/0459/6229/7504/files/new_hire_welcome_letter_template.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_off000059d4.bin
07b1634b826e1c3f018933571edd43061b1296f4fb1318da4a0c89f7f5b260a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D4 5820 bytes
font_01_sfnt_off00006d8c.bin
a23154aaf5ba4fc0a07b9ba19e1fd9ed216893995aee25ecd26df90e45c120d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8C 9948 bytes

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