Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f5bc39e1240aa2…

MALICIOUS

PDF

39.6 KB Created: 2020-08-22 10:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d6ae8e0997cad1978c97835398e336b SHA-1: 3293aa00b4050b91f8bd0457ff3b0afe02f50294 SHA-256: 12f5bc39e1240aa2b8262894905775098e9d317d7e56f37cef098a35e755c198
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to legal penalties and includes the malicious URL. The presence of numerous external PDF links suggests a link farm or redirection attempt, likely to obscure the ultimate destination and evade detection. No scripts were extracted, but the overall structure and embedded links indicate a phishing or redirection attempt.

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/pify?keyword=penalty+for+false+police+report+in+florida
    • http://pajagif.bcdoffshore.com/uploads/1/3/1/3/131381241/5982123.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2639/8888/files/binedimo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/67297407613.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/6134185549.pdf
    • https://cdn.shopify.com/s/files/1/0448/5208/4898/files/ponavabedofubitikufajeve.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/tidekemuxelokifujogodinuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/bidotorarikewesanem.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0920/files/muvumumizawav.pdf
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/80713252366.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30151397197.pdf
    • https://cdn.shopify.com/s/files/1/0437/6834/8830/files/jiteximupese.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/mercury_smart_craft_gauge.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_off00005d4a.bin
77d53ebd14db901a0c79e330092bb6d3281334be58aa71d84113dc66658f2185
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4A 5252 bytes
font_01_sfnt_off00006f38.bin
33c67e3f2628cc3b3564a65f286758d468caf759e94b80f64c7313b3b130f4f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F38 10040 bytes