Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f2932dfcdac597…

MALICIOUS

PDF

42.8 KB Created: 2020-08-21 19:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fddcb519346df4a4088325067386c22 SHA-1: cd4ebaf3e7f4885fcd90bd0bfd0c0aaadaad91a0 SHA-256: 72f2932dfcdac5977638d9f86af187d666734c6bb9b96032ca8eb6cbde5fe9d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=facebook+chat+stickers+free++for+pc, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains references to the same malicious URL and a large number of other PDF links, suggesting a link farm or redirection scheme.

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=facebook+chat+stickers+free++for+pc
    • http://juguzisax.confident-canines.com/uploads/1/3/2/6/132681352/nebomofe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/9175/4149/files/44191556591.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98908457197.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/impulse-_momentum_theorem_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/kuvetimaxepesuv.pdf
    • https://cdn.shopify.com/s/files/1/0463/0020/1117/files/47281204328.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/87943752675.pdf
    • https://cdn.shopify.com/s/files/1/0451/2183/1065/files/suwonadiwuroworedideripo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8497/2183/files/75169950127.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/45788598941.pdf
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/definicion_de_aprendizaje_segun_varios_autores.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/lokaxamojuzixoxonerogize.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dc9.bin
2daf8275a77a0e90f24ad25430d9d5183dd76c25e2f56192f12b12643168e3f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 4912 bytes
font_01_sfnt_off00006e83.bin
9f637d636bb14cd28ee8bbbf3f8482777fa711cf5902e64b160cdc0997788eb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E83 9888 bytes
font_02_sfnt_off0000900d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x900D 4324 bytes