Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e286ac78f38632…

MALICIOUS

PDF

43.9 KB Created: 2020-08-31 03:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3ed100e765a3f403644232ab5fb27fa SHA-1: 466eb6b4a82d9c6a29b6d2303536bd70a1f32bae SHA-256: f2e286ac78f38632145c254a09e69b1583dcc69e958745666d47b8ccf5704003
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=honorable+foro+mechero+2019'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body contains the same URL, reinforcing its role as a lure.

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=honorable+foro+mechero+2019
    • https://static.usrfiles.com/ugd/1e4819_968f412f53794780944ee7d1db594b2b.pdf
    • https://static.usrfiles.com/ugd/c7a620_90890aa71c8b4ed09b84015180b9c2e7.pdf
    • https://static.usrfiles.com/ugd/aec2ea_771db9ee8aca4ba2ab6acb76485d3e1e.pdf
    • https://static.usrfiles.com/ugd/03ae60_29c8f03863044f8a8ce628b72f7ad0e8.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/68244072036.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9453/files/covenant_eyes_android_issues.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/zorofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3337/0529/files/stepper_motor_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/59452946437.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4631/files/perfect_by_sara_shepard.pdf
    • https://cdn.shopify.com/s/files/1/0437/1457/6538/files/moxep.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7563/files/cionel_perez_scouting_report.pdf
    • https://cdn.shopify.com/s/files/1/0436/4225/7561/files/47113359927.pdf
    • https://cdn.shopify.com/s/files/1/0451/0813/4053/files/descargar_compendio_del_catecismo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e62.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E62 6440 bytes
font_01_sfnt_off00006e57.bin
c15c52ee06bcdead363e130c4ae24914725d0111437a84aa164897430538d797
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E57 5528 bytes
font_02_sfnt_off000080f7.bin
238bfe05e51dbc07a8ae99db4f18b911837f8358704f18a233530b292c325f7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x80F7 9600 bytes