Malicious PDF — malware analysis report

Static analysis result for SHA-256 772027dcf187123f…

MALICIOUS

PDF

40.9 KB Created: 2020-08-15 01:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95dd5727d0f1d410f3db07bd9ff05e80 SHA-1: 3371962a2d728c076994eb94ae166ba952852cfa SHA-256: 772027dcf187123f73e177d8468595f4d2d965dad9325ce7ed73b8518cec2cf5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating an attempt to lead the user to a harmful destination. The presence of a large number of external PDF links, as flagged by PDF_SEO_LINK_FARM, suggests a link farm used to obscure malicious activity or distribute spam. The ML classifier also strongly indicated maliciousness.

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=blaupunkt+smart+tv+43+inch+manual
    • http://files.aerialmediavisions.com/uploads/1/3/1/3/131398605/wiwizorepimivami.pdf
    • http://files.iconictruth.com/uploads/1/3/1/3/131380126/nipin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/dizesaledutufila.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9367/files/67335310923.pdf
    • https://cdn.shopify.com/s/files/1/0440/6879/8629/files/planos_arquitectonicos_de_casas_de_2_pisos_completos_en.pdf
    • https://cdn.shopify.com/s/files/1/0438/3696/5026/files/gujixutewo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/litisubisosovoferemel.pdf
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/mawazevuparofojilabutiki.pdf
    • https://cdn.shopify.com/s/files/1/0435/0548/3942/files/lojawumupojubakuravedis.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/56735334628.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/korofupisezevanujolibeke.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/kugunonogusepufivugul.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/nuduzinu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/21054323213.pdf
    • https://cdn.shopify.com/s/files/1/0431/6292/7253/files/mowepedimenozatikilonu.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_off0000529d.bin
f99bae50cce4776ea74f3e00659214df8ec8d52f7c22785c5ee975c024cf0631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x529D 5600 bytes
font_01_sfnt_off00006580.bin
e4580492cb054d7e135396fa866a9755b165621577938a6bf28fffe7351af959		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 15344 bytes

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