Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b933fcf63d728e…

MALICIOUS

PDF

35.4 KB Created: 2020-08-07 04:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 919d40641e00220d23f095258c50a4b3 SHA-1: 188c80e7d4934b4135396789eabb0b95b1efe24b SHA-256: a8b933fcf63d728ec41331538100b76eac129a20db97ac035d716f493cda3f11
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, many of which point to a link farm hosted on Shopify. These links ultimately redirect to a known malicious URL (ttraff.cc), indicating a phishing or redirection attempt. The document body itself is largely obfuscated but contains the malicious redirector URL, reinforcing the attack pattern.

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.cc/pify?keyword=andar+conmigo+acordes+ukulele+pdf
    • http://files.artisticawardsbyjoebourne.com/uploads/1/3/1/4/131483955/4729f4e4bbc80da.pdf
    • http://files.khrystaljcounseling.com/uploads/1/3/0/7/130740433/72a80dc2c2.pdf
    • http://files.ccharveymusic.com/uploads/1/3/0/7/130738554/guzasazifuvodefam.pdf
    • http://powif.krishnayogastudio.com/uploads/1/3/0/7/130775350/4958039.pdf
    • http://files.fucinarieportfolio.com/uploads/1/3/1/4/131406807/fotani.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/unicode_math_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/vipimedudatemodega.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/mozomosa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6459/8434/files/astm_e8_69.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6262/files/35264684098.pdf
    • https://cdn.shopify.com/s/files/1/0437/3757/9674/files/marowski_s_chem_lab.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/xekabexotagaleme.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4885/files/76861317564.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6935/files/tutinesogomonobejodano.pdf
    • https://cdn.shopify.com/s/files/1/0439/8986/0510/files/nesumopurenezetipewuvox.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/50629751935.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/ford_crown_victoria_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/0588/5090/files/juwazorusapev.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_off00004d3d.bin
e22c5d64af04fb91219a12f024000b6dc8cd1b67ba81a154e6bbe8b0332c912b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3D 5528 bytes
font_01_sfnt_off00005ff5.bin
6336b924d42347de9c396c51970bde1ff5226ba617865aaae7c69762fd675946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF5 9528 bytes

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