Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3f952249267416…

MALICIOUS

PDF

49.2 KB Created: 2020-08-18 22:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a214360ac56f2da23885ec39c493344 SHA-1: c1d02d0829fd2bd2c4415bceb02e131a9f40706c SHA-256: 8b3f952249267416bd87bb47a6a037d9dc159b916bea08cb7b4936cdf7ffe16f
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=coeliac+disease+review+articles+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking PDF links, suggesting a lure to a malicious site under the guise of providing research articles.

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=coeliac+disease+review+articles+pdf
    • http://files.alexkormannphoto.com/uploads/1/3/0/7/130738607/3a86d139531.pdf
    • http://lominu.philprobstcyclist.com/uploads/1/3/0/7/130739751/d5f55db6.pdf
    • https://cdn.shopify.com/s/files/1/0439/3923/3960/files/pevaretarawoxezofadoladu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/77371713144.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5095/files/how_to_set_up_a_total_gym.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/terrestrial_biomes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/ginitagikewururaxogex.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/1746561988.pdf
    • https://cdn.shopify.com/s/files/1/0438/4056/9501/files/27548991492.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_off0000839d.bin
5acac449a3328785b727ef777ebd49b2d2ddfc5061ecddbd36e99856261a56d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x839D 5204 bytes
font_01_sfnt_off00009572.bin
27f7030a38716f185dfe8ccf7fde61807aec064ccfba7299f98f09f086921829		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9572 10108 bytes

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