Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9d024c46e0c53b…

MALICIOUS

PDF

62.6 KB Created: 2020-09-02 11:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca0f8ec8a19176643fd9166f3d65c8d1 SHA-1: 52c585e8f452d0bd3e7db518e5431c0cdd9c795b SHA-256: 2a9d024c46e0c53bba503e7fa3f8ee97174e0ead5fc7d9a03a3ae7186a12c79a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector (https://ttraff.link/wix?keyword=movie+chucky+1), suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Movie chucky 1' and the malicious URL, reinforcing the lure. The presence of numerous PDF links, including one to cdn.shopify.com, indicates a potential link farm or SEO poisoning tactic to drive traffic to malicious sites.

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.link/wix?keyword=movie+chucky+1
    • https://cdn.shopify.com/s/files/1/0463/1383/2613/files/batwara_song_roop_bapla_video.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2165/files/autodesk_sketchbook_pro_ipad_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/3201/7058/files/pexukuzunalewimikidekudom.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/18485447245.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdf
    • https://cdn.shopify.com/s/files/1/0436/9829/0856/files/sagifilufek.pdf
    • https://static.usrfiles.com/ugd/0a0016_15ea5f484efa4e878f0503180b2028d8.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_f361f642c5114958b9cbbfcb2ee25120.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/93300066172.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/wedding_programs_thank_you_wording.pdf
    • https://cdn.shopify.com/s/files/1/0431/8055/6452/files/nuxalimuvevafel.pdf
    • https://cdn.shopify.com/s/files/1/0434/4745/1798/files/greek_philosophers_list.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_off0000b94f.bin
4d68b742d63dda8c5f016ebad9cdd44e793cae07fc31a00a31db1ac71f67a8bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xB94F 4656 bytes
font_01_sfnt_off0000c944.bin
617cbb5c9700e84f11bb1fc990ed72321a2814b33d5893bc8a7e6113b1da8704
pdf-font-stream PDF embedded font (sfnt) at offset 0xC944 10736 bytes