Malicious PDF — malware analysis report

Static analysis result for SHA-256 01744dcdbd89d102…

MALICIOUS

PDF

40.9 KB Created: 2020-08-03 06:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b20b650de70a74e332ee75b5f35607ba SHA-1: 97f59e8b2b08a2b7b7835784801fe7cb756660cc SHA-256: 01744dcdbd89d102be00bd5edf1071b71e0fdfb4c8f4fdbd8566d86ed8110b48
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=here+there+be+monsters+skyrim, which is likely used to redirect users to a malicious site. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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=here+there+be+monsters+skyrim
    • http://files.journeyhappyfit.com/uploads/1/3/2/3/132303374/binox-baxotibojara-resadidoxukep.pdf
    • http://files.engstromgroup.com/uploads/1/3/1/4/131453267/tukewabulekufem.pdf
    • http://files.mayumiworks.com/uploads/1/3/0/9/130969708/lewejijizuge-moguxaf-kupitofonuzale-sigonizusodasix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/nupapanotixazimidupu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/vudowadomovusulimapelewow.pdf
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/3789457625.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/jusuro.pdf
    • https://cdn.shopify.com/s/files/1/0434/0475/5096/files/48313463279.pdf
    • https://cdn.shopify.com/s/files/1/0430/7825/4753/files/64247147334.pdf
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/nekewudejegog.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/dikulet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1687/9271/files/51896059988.pdf
    • https://cdn.shopify.com/s/files/1/0434/4912/2983/files/97859734917.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4340/files/mobimulokaxusezozepavo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4464/9630/files/26908210752.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/40136683214.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_off00006207.bin
7746863801311fb8c8669003192c31a5cee202d13f8fabaa1a6cfff82bb9e419		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6207 4948 bytes
font_01_sfnt_off000072b8.bin
af698b228f06b73dd67c02d7750fd8c9ee9d8a100815318bc165496ab51190f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B8 10128 bytes

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