Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f00866916cbfd3…

MALICIOUS

PDF

41.3 KB Created: 2020-08-21 03:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 791d873f9f2ff6338b9baf1af7724f01 SHA-1: bde3092f070c3a6de155815871a15430cdadb8dd SHA-256: 31f00866916cbfd3702419bea57579ef2d95b05dbf89f0e8c2467b79ff35dd88
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=addition+of+decimals+word+problems+with+answers'. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The presence of many external links, including to shopify.com, indicates a link farm strategy to improve search engine visibility for the malicious content.

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=addition+of+decimals+word+problems+with+answers
    • http://files.rhinotruckparts.co.uk/uploads/1/3/1/4/131406104/roleduvibudapebov.pdf
    • http://sagives.thecyphersdenradio.com/uploads/1/3/1/4/131483281/gizixojozokig.pdf
    • http://lokubo.susanmerrillsquier.com/uploads/1/3/1/1/131163664/bazosuj_tesabapune_jorepusojikagom_sukilebebal.pdf
    • http://fofure.phouka-pugs.com/uploads/1/3/0/7/130775677/1fb5301293555ac.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/java_array_subarray.pdf
    • https://cdn.shopify.com/s/files/1/0438/4056/9509/files/badasizakuwevetekofijega.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/conduction_convection_radiation_middle_school_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/namakam_chamakam_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/pulse_rate_measurement.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/nerefowelolajose.pdf
    • https://cdn.shopify.com/s/files/1/0431/5771/7143/files/98879619000.pdf
    • https://cdn.shopify.com/s/files/1/0434/0390/3127/files/41829923967.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/85440771616.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/foxyutils_merge.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/karyotype_test.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_off00006152.bin
e2781b1b60c2c680a5e5457dcb499a7d024dbfcfc754fd20a41403a3afd6b3dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 5616 bytes
font_01_sfnt_off00007444.bin
5af8ba3bf3189b95470f170d93855e2a2b1f35270ebeeeaa2bcba47be2a07a02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7444 10464 bytes

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