Malicious PDF — malware analysis report

Static analysis result for SHA-256 5989d58aedbe33f3…

MALICIOUS

PDF

73.3 KB Created: 2020-08-01 18:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3858f07a35ce2a9c4b23d18232b843a1 SHA-1: 5b84c243578ec14463c0f0f434d68fa63af7b430 SHA-256: 5989d58aedbe33f35e70b54baa091bfc3b6169409f6b9c3b8657085592a59a75
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, including a redirector to 'ttraff.cc', which is flagged as malicious. The document body, though heavily obfuscated, also contains this malicious URL. The presence of a link farm and a malicious redirector strongly suggests an attempt to direct users to a harmful external resource, likely for phishing or malware delivery.

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=what+is+the+date+format+in+mexico
    • http://files.oakshot.com/uploads/1/3/1/4/131438228/fubaz.pdf
    • http://files.questioningdevelopment2016.com/uploads/1/3/1/3/131384070/jiwunukovisenaru.pdf
    • http://files.improvementscientist.com/uploads/1/3/1/4/131437074/kugabufuxat.pdf
    • http://files.kyleworshammd.com/uploads/1/3/0/9/130969297/pifuvofejodadirobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/59931866301.pdf
    • https://cdn.shopify.com/s/files/1/0435/7485/3793/files/widivofogagokax.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/maxotipidolupami.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15796621189.pdf
    • https://cdn.shopify.com/s/files/1/0435/8458/5883/files/belifegitomobirozop.pdf
    • https://cdn.shopify.com/s/files/1/0433/7916/3285/files/91593981589.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/42482349572.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/82777177235.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9586/files/zurevatisitokafovaxol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/dubinalu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/98360422499.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a365.bin
a1b3ae8280bbaf26cb24a3d3b3027978c75c5276555f95608a12067f6b9bdea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA365 4756 bytes
font_01_sfnt_off0000b458.bin
246d885dc469a2bf6bcbbd4ce947aa3c74c15d95fceeaa938aabeaf7219e7a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB458 5308 bytes
font_02_sfnt_off0000c64e.bin
aaa40d2deeeb8009abf68abd50bc1ae4025491999c6e047c2025869b8040ce75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC64E 16060 bytes
font_03_sfnt_off0000f871.bin
4b6719d096d7df7ed31b79ac5c8b978a517ecb459b60496acf1beb4454d4770b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF871 19128 bytes

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