Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e348b5133dc101…

MALICIOUS

PDF

37.7 KB Created: 2020-08-01 12:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e37f1d596ca6a0cb222e694ba01dd699 SHA-1: 61d630fbbc19658f2d3d6ef9450eed4b23f82c5c SHA-256: 96e348b5133dc101ce0fc78ba7d3ff3bb3129df3257d7a88f7ca12a5e21ca4bb
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded link objects reveal a link farm strategy, with the primary malicious URL being https://ttraff.ru/pify?keyword=essentials+of+marketing+perreault+pdf. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution.

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.ru/pify?keyword=essentials+of+marketing+perreault+pdf
    • http://files.dukeladyblue.com/uploads/1/3/0/7/130775131/zisexiloterewej-pizuw-meganos-luvularo.pdf
    • http://files.lsbookkeepers.com/uploads/1/3/0/7/130739593/muwofuwafe.pdf
    • http://files.islandmaidhawaii.com/uploads/1/3/1/4/131453674/nivaxideg.pdf
    • http://files.babydollsheepaustralia.com/uploads/1/3/2/6/132683292/kenoxejejise-tibaduboxajuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/4266/6656/files/42277623088.pdf
    • https://cdn.shopify.com/s/files/1/0433/0848/2710/files/legawopofemawobitufomabin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/31143185582.pdf
    • https://cdn.shopify.com/s/files/1/0432/4127/5547/files/22170196375.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/53581813927.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3815/files/30997183945.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/manixivofudemazukibogelap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/mananuliseze.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/88873995111.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudogezemolajefenupil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifowugebivagobawogun.pdf
    • https://cdn.shopify.com/s/files/1/0434/3778/5240/files/vemokopigozerawiwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/30584688320.pdf
    • https://cdn.shopify.com/s/files/1/0428/4727/3116/files/90111922617.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_off000051bf.bin
95f512955e2bfdbeba9ed458191f5e349f47e13f738c49c56dc200db011f89d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51BF 5384 bytes
font_01_sfnt_off000063fd.bin
1e7a9b646ad7abf0d30965356aac680a586d3e9909116a21a5a4ae2a79b439dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FD 10720 bytes

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