Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb558124aed91160…

MALICIOUS

PDF

46.8 KB Created: 2020-08-06 11:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa811d5d155a88037929de0fcf9e08d0 SHA-1: 11c414bd5b098ab9ecd319efe4ca6b36a6db603c SHA-256: bb558124aed911606748bcda89134a1c1b6d4cb8f1e904bf05c57d8e296fcce6
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=personal+financial+statement+sample+pdf'. This URL is designed to redirect users to potentially harmful content, disguised as a financial statement sample. The presence of numerous other PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to increase visibility and clicks. No scripts were extracted, but the primary attack vector is the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=personal+financial+statement+sample+pdf
    • http://files.130th.org/uploads/1/3/2/7/132740445/7803451.pdf
    • http://files.treatsicecreamparlour.com/uploads/1/3/0/7/130776485/sipemag-mobox.pdf
    • http://files.puppiesinbloom.com/uploads/1/3/1/4/131438758/notefujo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/xujaneduvokevopabupumadat.pdf
    • https://cdn.shopify.com/s/files/1/0429/2876/7143/files/mujuzagenab.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/ruzawidabafuniridevogomom.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/kipidon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/66274027871.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/employee_contract_letter.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/90980354923.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/mazenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/bijekuwazimukexutiwofog.pdf
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/aditya_hrudayam_stotram_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0432/7509/2132/files/32602039902.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/3182325569.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_off00007939.bin
a213a1a01b5e4fce826639f1c03ce0be080adfabcf9de4dacba071dff86fb974		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7939 5300 bytes
font_01_sfnt_off00008b2c.bin
a10d688c7266f686aa45a0feee35162adeb5d6106f049c280c1ad3d5a0c8ab15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2C 10244 bytes

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