Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab15a40ad71715b9…

MALICIOUS

PDF

41.5 KB Created: 2020-08-10 01:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66bd7137843bb22faaa1a33c9d728edf SHA-1: 86cec8c8bfa75bc96598947067d0642bb36018f9 SHA-256: ab15a40ad71715b96e006b70c675c96f899ce22ad54cb9de214af1fa0cb1ebec
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=digital+circuit+tutorialspoint+pdf, which is likely used to redirect users to malicious content. No scripts were extracted, and the document body did not provide further actionable intelligence beyond the presence of links.

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=digital+circuit+tutorialspoint+pdf
    • http://files.nh-dreamhomes.com/uploads/1/3/1/6/131606668/bovijalowosatadu.pdf
    • http://files.matchmypartytheme.com/uploads/1/3/0/7/130775651/rujezela_jawabar.pdf
    • http://files.smartrecruitment.com/uploads/1/3/1/4/131411199/1ded2f8.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/tidizekugivimisiferevevap.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/vopob.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/tekoken.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/mafigejewitametu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/93134431711.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/kewekuse.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/27147192908.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5799/files/verizon_channel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/97766291532.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/tibazikevituxata.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/11223049998.pdf
    • https://cdn.shopify.com/s/files/1/0435/4503/4911/files/semoxukuxixoka.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_off00006320.bin
e7a1b1d93498aef2ba21b3a67fd711cae4bb156de4f3845a9391854fa2d20ba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6320 5320 bytes
font_01_sfnt_off00007551.bin
1ace209c0d5dfefc3176628da68831c36ce9b74e21f021cb5268d694b7e1f31b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7551 10524 bytes

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