Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a2c052ed9f12ff…

MALICIOUS

PDF

40.4 KB Created: 2020-08-21 08:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d2b88b28a1004428a6cfa03708f2b4f SHA-1: 40bda430250451e5f348ad1475955ad5e250c15b SHA-256: d1a2c052ed9f12ff8239fff6493e8aa2018e850e9b7585ec0b3ac3c77e21644e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, many hosted on Shopify. The primary malicious URL is https://ttraff.com/pify?keyword=achievement+first+endeavor+middle+school+uniforms, which likely serves as a lure or initial stage for further malicious activity. The ML classifier also strongly indicated maliciousness.

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=achievement+first+endeavor+middle+school+uniforms
    • http://jixiwa.doreenfarewell.com/uploads/1/3/1/4/131453274/9086289.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5886/files/21627573481.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/craftsman_8hp_chipper_shredder_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0435/files/47620205751.pdf
    • https://cdn.shopify.com/s/files/1/0435/9979/0243/files/duvusogorala.pdf
    • https://cdn.shopify.com/s/files/1/0452/4238/4545/files/issuu_download_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4183/files/gutivuwavidabunolatutubap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/wrong_turn_4_link.pdf
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/68443059167.pdf
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/falemewajinufomulise.pdf
    • https://cdn.shopify.com/s/files/1/0437/2588/1498/files/statistical_treatment_data.pdf
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/watch_khabi_khushi_khabie_gham.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_off00005fff.bin
fc8763684f19494ceba38b9ca872ee94a4189b9f9f05a7011370b1cfac01dfb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFF 5312 bytes
font_01_sfnt_off000071e7.bin
c3a90c4a1cfc2ed14fa7c10589f654c184c11b1644e5dfdec91e8e0dfe43cabe
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E7 10208 bytes