Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b566a8388859377…

MALICIOUS

PDF

49.2 KB Created: 2020-08-07 05:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17d820228f9b0f4eca99078a7aa44551 SHA-1: bc1b077ce54a4af1d5e2bf4ff2dae5b7a84fb909 SHA-256: 3b566a8388859377d8fe919ef6a8649f08acd9aee0fc6b7b3d31fa2442bef86a
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=cs+lewis+the+four+loves+pdf'. The document body, though heavily obfuscated, contains references to the same URL, suggesting a phishing or malware distribution attempt. The presence of numerous Shopify links, while many are benign, is part of a larger link farm strategy to obscure the malicious destination.

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=cs+lewis+the+four+loves+pdf
    • http://files.kleinspainted.com/uploads/1/3/0/7/130776787/lufarorixotek.pdf
    • http://files.tankuanaw.com/uploads/1/3/1/4/131453429/8105149.pdf
    • http://fedupeto.anewbeginningpreschool.com/uploads/1/3/2/8/132815367/nadubidabit.pdf
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/lesapaxubilonojipepuvok.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/58381617737.pdf
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/73285361164.pdf
    • https://cdn.shopify.com/s/files/1/0441/0572/8152/files/vudonevimevikifuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1287/files/jiwowejivonegeser.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3834/files/bajaperijuxetenabideduv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4153/7696/files/cirrhose_foie.pdf
    • https://cdn.shopify.com/s/files/1/0431/0918/7750/files/pevijapuzozaxozojexodar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/46475257566.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2315/files/51851929086.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bibekejufalakudogaloseja.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/food_drive_flyer.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/39003714262.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_off00007dbd.bin
8babee967f2bd6e7ef9099a40a88d10ba36786b4a147150a8252d546ac53b47a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBD 4976 bytes
font_01_sfnt_off00008ebc.bin
7497a7d144a5831e0141aaac8bdd7e6ac4cb82e0a9b6552e2876eb8b5a0cd9fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBC 12416 bytes

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