Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9233a0bd5bb06c…

MALICIOUS

PDF

36.1 KB Created: 2020-09-03 11:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02eb4da99304afe15a36f0415d590346 SHA-1: ac3edc41eed534db60857334eb2aec0c38fb4a7b SHA-256: 2a9233a0bd5bb06ce461527c0b2169f2c47d67bbc1ecdabaaa6c7b5c933e13a2
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a manual title and references a URL that is also flagged as a malicious redirector. The presence of a 'Fake invoice / payment lure' heuristic further suggests a social engineering attempt to trick the user into clicking the malicious link.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=witschi+chronoscope+s1+manual
    • https://cdn.shopify.com/s/files/1/0461/5421/9683/files/athletics_event_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/87310940872.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/vemulaselad.pdf
    • https://static.usrfiles.com/ugd/87a178_d903c1e56c2f4521b717d517bbddd25a.pdf
    • https://static.usrfiles.com/ugd/963627_6992fdd9815c43469a90fd04bca867cd.pdf
    • https://static.usrfiles.com/ugd/cc1a03_ecd0278bd6ea45febcd9bf3cf49c4381.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd1db809a18e444b985757bc68cd7cfc.pdf
    • https://static.usrfiles.com/ugd/c57cae_1bcd12a025424057891b53abc082ad00.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/jikoxuvewasenaxakuti.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/nuzodosefigabetuvunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/annamalai_university_distance_education_prospectus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gotisirifiwixi.pdf
    • https://static.usrfiles.com/ugd/fa6f14_11842eee85a342cb861fb3ee7eb8e6b6.pdf
    • https://static.usrfiles.com/ugd/3aee12_75b59ac87c4d48ef9fdb5cd1f9cde286.pdf
    • https://static.usrfiles.com/ugd/b8c837_79c122cbb9e543bfa8fee33298bd20e3.pdf
    • https://static.usrfiles.com/ugd/71fd01_da01a93b1b764415872ee054c7ac3360.pdf
    • https://static.usrfiles.com/ugd/909b15_405907109c1143a5818909be667c9df4.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_off00004f24.bin
b50038ea3da720f2912269f7de373d2833f84d7967ecbe80c902f1908c2eb347
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F24 5236 bytes
font_01_sfnt_off000060dc.bin
f4f95f9435badbf9d15ac9a3f7035051f537e3468e763a8f0ad9879d1726b9ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 10116 bytes