Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22895adcccd15f7…

MALICIOUS

PDF

37.6 KB Created: 2020-08-18 18:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cc2e44558c8a0e8d27f9f65b110d0fc SHA-1: 79afed45cbe756b1fb3d3e786e570d99957ca993 SHA-256: a22895adcccd15f7800904c7e76dbcfab3485bb3ae752944940d7d809f19ccde
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the embedded URLs, https://ttraff.com/pify?keyword=solid+black+background+android+app, is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains fragmented text, but the presence of this malicious URL and the link farm structure strongly suggest an intent to redirect users to harmful sites.

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=solid+black+background+android+app
    • http://files.jhmtva.com/uploads/1/3/0/9/130969311/f6ddae96a0b7173.pdf
    • http://lesixoga.tianyugu.com/uploads/1/3/1/4/131438233/5723019.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0293/files/pour_le_libralisme_communautaire.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/tonej.pdf
    • https://cdn.shopify.com/s/files/1/0428/1955/1388/files/89092273775.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/71687082319.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/zegazekoremagubivafo.pdf
    • https://cdn.shopify.com/s/files/1/0436/6080/4249/files/99429624014.pdf
    • https://cdn.shopify.com/s/files/1/0447/0842/9977/files/marriage_bio_data_format_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/14073984766.pdf
    • https://cdn.shopify.com/s/files/1/0440/1872/9110/files/lala_ramswaroop_calendar_august_2020.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_off000053cf.bin
7e681967e1f8593df461e5d359dcadb3f0e7b3df01aae0cbd5e296341a000f73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53CF 5368 bytes
font_01_sfnt_off00006617.bin
6efb86f8ec8f3eacf1ff71abda8fdbed48c802fcf1fa02f5c5b0687d62f11a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6617 10468 bytes

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