Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b10259537187bc…

MALICIOUS

PDF

49.7 KB Created: 2020-08-31 01:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dfab545f5154606d454f61f385a83de SHA-1: 812cfaefbf2b5e6205759766bd797bbcbb2791a4 SHA-256: 61b10259537187bc848e672dd0c345554d66ea1a9ca7b562e1752416be3019e8
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a strong indicator of malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to a 'Toro lawn tractor repair manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous embedded links, many pointing to Shopify, further supports the idea of a link farm or distribution network.

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.me/wix?keyword=toro+lawn+tractor+repair+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/nijegatolasutinegikixev.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/wamajonikivirolitowibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/talumor.pdf
    • https://cdn.shopify.com/s/files/1/0439/5014/5704/files/sesax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/rg6_vs_rg59.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/aerodynamics_of_aeroplane_wing.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/42312041050.pdf
    • https://cdn.shopify.com/s/files/1/0433/5796/2405/files/6807096066.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/factory_physics_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/76818131555.pdf
    • https://cdn.shopify.com/s/files/1/0430/6072/3865/files/gejudabutasifevigos.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5879/files/sixibuforaxunep.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/polaserovaxigeridalidinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/toxavesomuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/goodreads_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/9657/5904/files/1801579326.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_off000084a1.bin
f9863d9c227b18959819872dacfe0f3acb7b4a304525f04d2e6251648b3c10d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A1 4940 bytes
font_01_sfnt_off00009568.bin
2b9d295c59e5de42449889aae626236b730840024af857874704618b0cff5230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9568 10560 bytes

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