Malicious PDF — malware analysis report

Static analysis result for SHA-256 b959ddea153b891e…

MALICIOUS

PDF

50.4 KB Created: 2020-08-23 12:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de4c430e65de3cdff5fdec99593309ff SHA-1: a5388d808b97bd7c18ff4d70751b54196c05c581 SHA-256: b959ddea153b891e278c5072947195f1d4842ecd902c9385e2847a3124f42c7b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=android+developer+store+data'. Additionally, it features a PDF link farm with numerous links hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.cc/pify?keyword=android+developer+store+data', is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

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=android+developer+store+data
    • http://files.toughguardsingapore.com/uploads/1/3/0/9/130969192/wukepege.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/79444877040.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/fepexejubakafixazularamo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/ditavoxadefafexikugerafif.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4560/files/gemuvurasovow.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/integrated_reporting_committee_irc_of_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/371402482.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/alternating_current_fundamentals_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/spinning_instructor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/pantone_colours_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9680354999.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3762/files/xatiju.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/54257828486.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/14371590800.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_off00008690.bin
36c2ad56e45b1adc89e51056638aa1af9254f9388c67ffb3a2ab1baf11e949b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8690 5000 bytes
font_01_sfnt_off0000979e.bin
15fe992f17ffcabe9bf077dcb2388324572bb0b24ffe1e795f84911f0a2edb79
pdf-font-stream PDF embedded font (sfnt) at offset 0x979E 10908 bytes