Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b38f8db055dc6f…

MALICIOUS

PDF

36.0 KB Created: 2020-08-11 06:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffee2136a9955ab25eab11feef5a83bc SHA-1: 38e4b5e1f6c7c80019c65aa54c1001e66fdf0c7d SHA-256: f0b38f8db055dc6f82a07aaa936170f3580baf6a21fd70378513ba6e85402363
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, directing users to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains the same malicious URL and numerous other links hosted on Shopify, likely intended to appear legitimate. The primary malicious URL is https://ttraff.com/pify?keyword=advanced+computer+architecture+textbook+pdf+download, which is designed to lure users into downloading files.

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.com/pify?keyword=advanced+computer+architecture+textbook+pdf+download
    • http://files.sweetavenuephotographyblog.com/uploads/1/3/1/8/131856112/5936769.pdf
    • http://files.eye-cue-driver.org/uploads/1/3/0/9/130969826/gozixufotalosabisa.pdf
    • http://files.lapen.us/uploads/1/3/0/9/130969048/gabanefuzujezu.pdf
    • http://files.sandyjwells.com/uploads/1/3/0/8/130874220/ronekewi.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/vudumesalibitusajaxojoge.pdf
    • https://cdn.shopify.com/s/files/1/0429/7077/5706/files/jekebedaxuruvotazudewow.pdf
    • https://cdn.shopify.com/s/files/1/0434/3162/4853/files/biological_science_1_and_2_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/effects_of_drug_and_alcohol_abuse.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/engineering_drawing_basics_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0438/1851/6637/files/21096613379.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/5258/1542/files/32088499879.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/14473278818.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/wexiriguluk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2257/files/vubawu.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_off00004e78.bin
b2c3586adfa06168bb793e8c0cba168a883bee2722be058315a6f612f8561d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E78 5632 bytes
font_01_sfnt_off00006180.bin
4311d1e1a6cde21f7cb24ed0e152772f9d1666c562137fba58d93dffd4541a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6180 9700 bytes

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