Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73f8612cd4947c6…

MALICIOUS

PDF

43.4 KB Created: 2020-08-22 16:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 259ac32422616ecbbe0e0c7341c54dae SHA-1: 0d61f5e6ca3e508b2170d82ee4b2fb74abc0abbc SHA-256: f73f8612cd4947c6cd82e5d8b82ff9bd9a9da91024a02d527631dfbb9fc260c0
130 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=cdc+group+b+strep+guidelines'. It also exhibits a PDF link farm pattern, with numerous links pointing to shopify domains, likely for SEO manipulation or to host further malicious content. The document body contains urgency lures, reinforcing the malicious intent of the embedded links.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cdc+group+b+strep+guidelines
    • http://files.anmhomedecorandmore.com/uploads/1/3/2/8/132814906/geralawevixopud.pdf
    • http://files.brittanyhassandesigns.com/uploads/1/3/1/4/131437149/sadubujulakuv-fuxezorutidibe.pdf
    • http://files.teachkidsnz.com/uploads/1/3/0/7/130775245/2110030.pdf
    • http://files.lafontanabocaraton.com/uploads/1/3/1/1/131164568/7143752.pdf
    • https://cdn.shopify.com/s/files/1/0464/6889/0782/files/present_value_annuity_due_table.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ferenap.pdf
    • https://cdn.shopify.com/s/files/1/0452/2383/7856/files/12713158046.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/bipevipodejefoji.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/49965391974.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/muzup.pdf
    • https://cdn.shopify.com/s/files/1/0439/6836/4702/files/funciones_de_los_organelos_celulares.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/kifojunod.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/nadax.pdf
    • https://cdn.shopify.com/s/files/1/0449/2810/6651/files/enlaces_covalentes_unam.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/rudirifibuwa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/optional_java_8.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/how_to_program_cox_remote.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_off00006b80.bin
ce821e54db82be1d3ae9eeb17f64be7da94f5afc3446566fd7886c1fc0c38f2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B80 5076 bytes
font_01_sfnt_off00007ccd.bin
8470114042dc45ecf9af0b8a780171306fd2b84ac69dc0838e5efde716f7e9a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCD 10576 bytes