Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dfae9d6b4038a5c…

MALICIOUS

PDF

38.2 KB Created: 2020-08-25 22:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abcbe8307a7144ddbd2e7f9c9cf668b3 SHA-1: 2bc2c800a0180a541b60f629845a855a58b2e9b5 SHA-256: 7dfae9d6b4038a5c06fd924161bc36d661d552792f8dd6329700af24219f0688
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=dudley+moore+trio+jazz+in+oz', which is flagged as a critical threat. The document also hosts a large number of external PDF links, suggesting a link farm or redirection strategy. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to lure users 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.cc/pify?keyword=dudley+moore+trio+jazz+in+oz
    • http://files.joymcdanieldance.net/uploads/1/3/1/3/131379443/kitajanaz.pdf
    • http://files.theyogaschoolny.com/uploads/1/3/0/7/130775942/668541.pdf
    • http://files.pepeandnixi.com/uploads/1/3/0/8/130813696/dinoborama.pdf
    • http://dedes.vinesnkerr.com/uploads/1/3/1/4/131406082/3722419.pdf
    • http://lagiw.fritzassociates.com/uploads/1/3/1/3/131398101/xafujixigef-gosusar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/35711989856.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3580/files/75565667962.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/65099726233.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/45427513361.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3635/files/46621836075.pdf
    • https://cdn.shopify.com/s/files/1/0433/5684/8282/files/vesawemonetenodufavik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19194700937.pdf
    • https://cdn.shopify.com/s/files/1/0445/1749/0847/files/36107252786.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/beatriz_sarlo_libros.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005961.bin
3277d1cfa86ba5e408c83be1e492aeb0fbbf63b979bd63c103dc4734c99b6c39
pdf-font-stream PDF embedded font (sfnt) at offset 0x5961 5020 bytes
font_01_sfnt_off00006a6a.bin
fb26fa61b0cdb2be15f4a830256a6ef2717fd98c35a5e75eea5e87a57fb2c050
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6A 9896 bytes