Malicious PDF — malware analysis report

Static analysis result for SHA-256 7351cc77cac75b7c…

MALICIOUS

PDF

49.3 KB Created: 2020-08-16 18:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c05f413e67e69a4b64ad47714780fc2 SHA-1: fecf875bc55788e973c681468662fe0c77a46dd1 SHA-256: 7351cc77cac75b7c72778a45670db3a51ae77d5dc52c4ee55d24b8eda7c75ad6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same malicious URL. This suggests the primary goal is to redirect users to potentially harmful content, likely for phishing or malware distribution.

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=behringer+mixer+xenyx+802+manual
    • http://files.eastcentralcasa.com/uploads/1/3/1/4/131407968/ninujijora.pdf
    • http://kulexupal.stjohnsalamo.com/uploads/1/3/1/8/131856772/sateros.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/64007077824.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/structure_and_composition_of_atmosphere_hydrosphere_lithosphere_and_biosphere.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/55482851774.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/30322527259.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/20265959246.pdf
    • https://cdn.shopify.com/s/files/1/0440/6942/1206/files/pexunazenemi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0556/6366/files/96870524097.pdf
    • https://cdn.shopify.com/s/files/1/0443/4529/5004/files/74132125248.pdf
    • https://cdn.shopify.com/s/files/1/0437/0402/5242/files/26093815362.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/fosonapiretuvowexogadob.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/remasisekof.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/land_sale_agreement_form.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_off000081cc.bin
af6b4a3c429e7414d505d35a69194252538dd3dc1cffdd261fb664e876b48174
pdf-font-stream PDF embedded font (sfnt) at offset 0x81CC 5608 bytes
font_01_sfnt_off000094ba.bin
995c291bfa131621b5c370da702ae9fe88123af756e03760f83d621079bed12a
pdf-font-stream PDF embedded font (sfnt) at offset 0x94BA 10524 bytes