Malicious PDF — malware analysis report

Static analysis result for SHA-256 7922dc78907c2c57…

MALICIOUS

PDF

57.8 KB Created: 2020-08-19 10:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e8e4b50373618e4ee2a51d35e59e3b5 SHA-1: d0984d838bb9e78b6fd259179c0a8785a99429f0 SHA-256: 7922dc78907c2c5798d8e68e61210ab1dae189b1986a17ba96dacd3ae3812646
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=article+format+spm+2018', which is likely used to funnel traffic to further malicious content.

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=article+format+spm+2018
    • http://viben.lindsayrandall.com/uploads/1/3/2/6/132682076/fabaxonuwus.pdf
    • http://files.simplyburtons.com/uploads/1/3/0/8/130873820/5861548.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/82533619137.pdf
    • https://cdn.shopify.com/s/files/1/0430/4814/0949/files/24413841528.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/23888945327.pdf
    • https://cdn.shopify.com/s/files/1/0434/6164/0358/files/93406668117.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/designing_data_intensive_applications_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2119/files/legagexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/dilobowifuxubafunuxonetu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/sidonirugenifuxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3011/files/polas.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_off0000a4ac.bin
a0c180722d541e6b998d4b36272a3ab5f84852fdc1ff2e79d50fe91abfeb8c5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4AC 5672 bytes
font_01_sfnt_off0000b7df.bin
e2cbd7e548c3ad2d73559e2059feb9f6c898b88b92ef7f9155da715011973176
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7DF 10120 bytes