Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d3e80d4b677608…

MALICIOUS

PDF

41.5 KB Created: 2020-08-29 16:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1374770c2321fbce454fba06c9794543 SHA-1: 9a5955eb5c5efbf99632dc7bcff173e2b30bddbb SHA-256: e0d3e80d4b6776087aae942ae364e94c05833db841caba13f7ec090c3f0c24f4
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content through a link farm. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious redirection link.

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=conan+sunken+city+guide
    • https://static.usrfiles.com/ugd/b8c837_832aecef188b4b538cd4dcace800634b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ba846b4025f45488450396b5fc21405.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a0877cee3764e93b4848565cb1e6791.pdf
    • https://static.usrfiles.com/ugd/e8506d_f309c6fe5b3f498e96c1e4ea7b6cb768.pdf
    • https://static.usrfiles.com/ugd/1e4819_34b29e52479e492b852dde9d8e455e63.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/casio_edifice_eqs_500_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/fantastic_contraption_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/8877/3269/files/90206609859.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6630/files/tetodejeto.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/zenifakakowegosovifabim.pdf
    • https://cdn.shopify.com/s/files/1/0449/7784/8488/files/aqueous_humor_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0437/7831/0295/files/68302688347.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/67265306264.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_off00006609.bin
92280604a29e66804be59cc1db01df939c3daaaca49746b7c855b5c52b4f7a73
pdf-font-stream PDF embedded font (sfnt) at offset 0x6609 5052 bytes
font_01_sfnt_off00007759.bin
625ba29abeda63e278980bc71ffc9627cb2f8a550bb504619c0727407758b2d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7759 10028 bytes