Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c835ef56c62be0…

MALICIOUS

PDF

39.8 KB Created: 2020-08-28 02:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b9a578f90923682851509e3f912a7dd SHA-1: faa56e7a11d7e87eee057b815721c46162a4eb3e SHA-256: 95c835ef56c62be0f1cfb13a211cc9f22e319081805822899203e8e626d407df
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.com/pify?keyword=adobe+xd+cc+portable+free'. The document body, though heavily obfuscated, appears to reference 'Adobe xd cc portable free', suggesting a lure for users seeking software. The presence of a link farm and a high ML classifier score further support malicious intent. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=adobe+xd+cc+portable+free
    • http://gevib.finnandbuffy.com/uploads/1/3/1/4/131407469/31a68.pdf
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/ropazivofizigoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/bajrangbali_baba_ke_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/elementary_algebra_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0463/3634/4226/files/suara_burung_pipit_gunung.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/rufixiwunufomoniriwaxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8313/7178/files/catlogo_mary_kay_julho_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/3835/1255/files/hematology_tests_explained.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_off00005e4d.bin
ea4cc6f32b0ccd64af2d2fb2633042da0781edc56ef6bc1a4e4892a1cdf7289b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4D 5168 bytes
font_01_sfnt_off00006ff2.bin
7d6acc0a402b5e6a862e301a19d270a0f458a0fe44ac77bc8c2345675afeb427		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF2 10316 bytes

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