Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1fa2aefba498d1…

MALICIOUS

PDF

39.1 KB Created: 2020-08-15 05:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf9e0797510303b1cae3df246c741769 SHA-1: 34da182e51a933e9e6299911c37dc179b19d0ec9 SHA-256: dd1fa2aefba498d1b7d36c2c0c445c50dea5ede51cfa256d21ffe357eccc3e95
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=convert+pdf+to+word+using+zamzar'. This URL is likely part of a phishing or malware distribution chain. The document body also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to attract victims. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=convert+pdf+to+word+using+zamzar
    • http://files.marilynrayphoto.com/uploads/1/3/0/9/130969551/6798839.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/22790067464.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/fijap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/saduziforoxizu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/architectural_drafting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/86105168228.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5388/files/62956924934.pdf
    • https://cdn.shopify.com/s/files/1/0437/9751/2354/files/deformation_of_the_crust_continental_drift.pdf
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/61009611491.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/8754838709.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/90584989531.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/vufuzag.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_off00005b1b.bin
78532c26ea375b9daca82900a3131957a07f9a92b8688c8ad36f6c62ac7dfecb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1B 5436 bytes
font_01_sfnt_off00006da3.bin
137ac1fb0837f83efc07212532dc56b1bea53fc382a0a192e6604c8220880194
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA3 10056 bytes