Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1697f13b6ab4ef6…

MALICIOUS

PDF

43.5 KB Created: 2020-08-03 04:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de6f4901f1288a5711bd01ce7b30387f SHA-1: 3e15201169af5a9cd5fdcdb3fbfe00b4fc24673f SHA-256: a1697f13b6ab4ef66a40dfe08576e88eb5cfb63748a374a746e88e3596f09f07
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=fiendish+codex+3+pdf, which is likely used to obscure the ultimate destination of the attack. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the extensive link farm suggests a phishing or malware distribution 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=fiendish+codex+3+pdf
    • http://files.ianbphillips.com/uploads/1/3/0/7/130740378/bizawi_junimeragar_puzafokuja_tivinojad.pdf
    • http://files.andersonpsychassoc.com/uploads/1/3/2/6/132681322/noguforut_vujoturerug_gazovajaz.pdf
    • http://files.bengonzalez.com/uploads/1/3/1/4/131406286/07da61404e676.pdf
    • http://files.johncharlespennington.com/uploads/1/3/1/8/131871780/2e67f884f.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0431/8216/2084/files/xapimikune.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/lonely_boy_tablature.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/74140048101.pdf
    • https://cdn.shopify.com/s/files/1/0434/1681/3735/files/71777539410.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/lavanazotaran.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/mazda_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/35499648493.pdf
    • https://cdn.shopify.com/s/files/1/0439/1396/9819/files/minecraft_account_username_and_passwords.pdf
    • https://cdn.shopify.com/s/files/1/0445/3980/5855/files/pearson_catalyst_lab_manual_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/zubuvujadimafaguz.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_off00006cd1.bin
563390a866d954a479edf66bbe70444223dd099a39426a4bec17b22088b74bef
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD1 5092 bytes
font_01_sfnt_off00007e37.bin
1723082325de646524ad8159e2ec32584d5250e860aa9619b6a9dacdbecba190
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E37 10184 bytes