Malicious PDF — malware analysis report

Static analysis result for SHA-256 354b5a01f24141f7…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 10:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1652a2f275ea494a3717951cb7badfc7 SHA-1: 23a2527bd1c9ef12b95c61bd2c9183bcd862dcf2 SHA-256: 354b5a01f24141f74b1889efd78e3d785f6f1c443011afbc708afeebd0f3d944
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains this URL and other URLs pointing to Shopify, suggesting a link farm or content-luring tactic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of the exact payload delivery mechanism.

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/wix?keyword=the+arcs+vs+the+inventors
    • https://cdn.shopify.com/s/files/1/0433/5868/3295/files/488195742.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/rixeluxal.pdf
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/autocad_architectural_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/characteristics_of_modernist_poetry.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/xaxamokurukodoguzofone.pdf
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/cumberland_county_nc_sheriff_reports.pdf
    • https://cdn.shopify.com/s/files/1/0449/5425/5515/files/brainstem_stroke_syndromes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/lavukigumina.pdf
    • https://cdn.shopify.com/s/files/1/0432/5802/0000/files/functional_analysis_and_applications_siddiqi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9319/files/battle_run_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0435/4785/2959/files/kokejosewedaxob.pdf
    • https://cdn.shopify.com/s/files/1/0430/7697/6791/files/56834064875.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/fokiti.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_off00005be7.bin
73f517414c5eee1c07cb6352a1deb06544572ac39be9681b395af541ec961602
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE7 4864 bytes
font_01_sfnt_off00006c73.bin
80d5438d78ea66a05ae2906291c757b4494100257c76952e0f870090b74f7114
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 10460 bytes