Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde43964f1eb5dcf…

MALICIOUS

PDF

41.7 KB Created: 2020-08-01 22:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf23633a89d4fbcb03a62f0d73a975e2 SHA-1: 8633f1944c42efd2593d6d183ca0b7d88609bd6b SHA-256: dde43964f1eb5dcf920804ca99a49ca4041de64b82bd3c5aca786ff67febf2fe
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body, though obfuscated, contains text suggesting it is an owner's manual, likely a lure. The primary malicious URL identified is ttraff.cc, which redirects to other sites, potentially for further exploitation or phishing.

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=2016+toyota+camry+se+owners+manual
    • http://files.cardinalfastener.com/uploads/1/3/1/1/131163684/mififago.pdf
    • http://files.florencetrackclub.com/uploads/1/3/2/7/132710601/8595793.pdf
    • http://files.manujaspeaks.com/uploads/1/3/0/8/130814056/zemeda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65431134640.pdf
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/kinukemimivikoroni.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2675/files/canon_mg2900_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/fuvilumukarejusu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/billy_blanks_wife.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/62354850749.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/69004560879.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/22861023339.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/81899956016.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80084587067.pdf
    • https://cdn.shopify.com/s/files/1/0440/0663/7726/files/jopisasosuni.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_off00006427.bin
09f0dcf82c57445c3299ee30e42f43bc90298adbf0dc41ac491dcb8ff4cce630
pdf-font-stream PDF embedded font (sfnt) at offset 0x6427 5524 bytes
font_01_sfnt_off000076f1.bin
cf1bb0dab7ca3612d419b3dbe325cc4b9dacd5be56b91465d3506645fed7240d
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F1 10208 bytes