Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebf18068b133195…

MALICIOUS

PDF

54.9 KB Created: 2020-08-16 17:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da017298ddec93f92b3ba33ff9265d3b SHA-1: 7c1132533db49595012c2d5b36a395d5a52af602 SHA-256: 0ebf18068b133195669ecf815b48eee2955be6d749ada438ff7f924e18d827a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to contain the same lure URL. The PDF also hosts a large number of external links, suggesting a link farm for SEO manipulation or to distribute further payloads.

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.ru/pify?keyword=harvard+business+case+studies+pdf+free
    • http://files.301cresteds.com/uploads/1/3/0/7/130775977/vonetiboruzodir_foriv_fimewujixet.pdf
    • http://files.kicoevents.com/uploads/1/3/1/0/131070481/6297138.pdf
    • http://files.bodyandsolspa.com/uploads/1/3/0/9/130968962/9859347.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/zepowula.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/7974602186.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/lezup.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/7276643558.pdf
    • https://cdn.shopify.com/s/files/1/0435/4637/8404/files/satoxidisu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0549/files/apology_language.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/12515427801.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/suzuki_jr50_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/13406927864.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_off00009a27.bin
95c82cd5bd6aca0d9f7f91208e605c3ef42240413e815146febb0487bbd010f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A27 5276 bytes
font_01_sfnt_off0000ac25.bin
3b0898e127f743ef0d7088fd2e5ce9f27a475abc758cea9591bb3eacbc348a39
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC25 10076 bytes