Malicious PDF — malware analysis report

Static analysis result for SHA-256 1081352254bdd21b…

MALICIOUS

PDF

46.4 KB Created: 2020-08-31 08:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3d2a2eb53b52a2f72315ac0baade370 SHA-1: b10bbfdc6d856f43bd9106a199f2108753a7ffac SHA-256: 1081352254bdd21bd9de83d5df7d62a92150680ac31171b68017c5573643c720
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.cc/wix?keyword=aid+to+bible+understanding+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of numerous external PDF links, many pointing to static.usrfiles.com, indicates a potential link farm or SEO manipulation tactic to distribute malicious 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=aid+to+bible+understanding+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_fb6985de4f654a1cb937a6641e90bf53.pdf
    • https://static.usrfiles.com/ugd/b8c837_04f5f48ba3c547f8bc0aa6758eec0ba4.pdf
    • https://static.usrfiles.com/ugd/590778_def0b4419ad24bd4a8d6f786c0dae4d2.pdf
    • https://static.usrfiles.com/ugd/36f25b_79f6aacd9c48410fbff38546dc7abc00.pdf
    • https://cdn.shopify.com/s/files/1/0440/0067/3950/files/jacksonville_jaguars_injury_report_week_6.pdf
    • https://static.usrfiles.com/ugd/b8c837_56832bff5e0b4c5982dfa82bff44cd28.pdf
    • https://static.usrfiles.com/ugd/b8c837_a00b39fa349240669eb7eb1927b1ac20.pdf
    • https://static.usrfiles.com/ugd/b8c837_1419d63d92f34f3ca6cab4cd2a702b00.pdf
    • https://static.usrfiles.com/ugd/bd5c68_dd517455ba484a4c81ad763b8ddb0947.pdf
    • https://static.usrfiles.com/ugd/a91264_0cea7517f5d7409e924447e63cc83d16.pdf
    • https://static.usrfiles.com/ugd/f0e51d_2a4e4e1a9b664b9f94e46b3848bc2855.pdf
    • https://static.usrfiles.com/ugd/289c5e_dc9c8d1f3410489eafbcb3fa63350897.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcf80aa6fffb472da0acee1cf44d735d.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007480.bin
658e3602b918e2508c17a936589573ab0ab4f34492f721b9051366d4202154d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7480 5336 bytes
font_01_sfnt_off000086ac.bin
fa3704c5f46f64f3af50af3d2b52bdc5575054ff0d20b9903a8dcaf41685e2d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x86AC 10708 bytes