Malicious PDF — malware analysis report

Static analysis result for SHA-256 af246aef175fab1f…

MALICIOUS

PDF

48.8 KB Created: 2020-08-05 03:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 767fab1d5a527b8fbaff154f1f0eb5f1 SHA-1: 2f08d29581363704167791ad940369b10dd1e983 SHA-256: af246aef175fab1fd733ae2337a40dfe9857541fa612127f2d4a6035aa0fa1d4
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=meteorological+station+pdf'. This URL is likely part of a phishing or redirection chain designed to lead the user to malicious content. The document also contains a large number of embedded links, many hosted on shopify.com, which is flagged as a PDF link farm. The document body itself is heavily obfuscated and contains the malicious redirector URL, suggesting the primary intent is to trick the user into clicking the link.

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.ru/pify?keyword=meteorological+station+pdf
    • http://files.princetonclubbiggestloser.com/uploads/1/3/1/0/131070689/5232987.pdf
    • http://files.maxstrength.org/uploads/1/3/1/3/131383613/faxetonelajaki_zipob_zasuduror_tivabibovizi.pdf
    • http://files.maritimeheritagepress.com/uploads/1/3/0/9/130969077/6523106.pdf
    • http://files.shonkalay.com/uploads/1/3/0/7/130739601/buvifopolafap-fajezuxujovuwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/kefezodokas.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/96177427036.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53940391871.pdf
    • https://cdn.shopify.com/s/files/1/0437/8673/1671/files/natipasomenijapuwew.pdf
    • https://cdn.shopify.com/s/files/1/0432/8158/0188/files/13754438042.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/zavasufonebajavodulowat.pdf
    • https://cdn.shopify.com/s/files/1/0430/5282/6777/files/mukoju.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/auden_poems.pdf
    • https://cdn.shopify.com/s/files/1/0430/9221/3911/files/24165951322.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zeranosorijajigafa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4577/files/fusalexudutim.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_off0000807c.bin
b380e26bfd5c1de61f3d0133994229b44a3204a46442351538df52cff2c20813		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807C 5328 bytes
font_01_sfnt_off000092b9.bin
105da510f9493e6377d04acec43c5284b12e74ff367097434c177869d5fb53d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B9 10468 bytes

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