Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba1106cf984975d…

MALICIOUS

PDF

34.7 KB Created: 2020-08-12 03:34:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84fe242ea47d20bec3cba4691d3d9fa7 SHA-1: fc7c47305cc49dcd3ee06e1d63eff629992cf843 SHA-256: 3ba1106cf984975dfc15464c0cc144254a76291920c5061187fa9b19b60db8cf
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=vernier+caliper+worksheet+with+answers+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to educational material, likely a lure to encourage clicks on the malicious links. No scripts were extracted, limiting the analysis of direct payload execution.

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=vernier+caliper+worksheet+with+answers+pdf
    • http://files.theecmcancerfoundation.com/uploads/1/3/2/3/132303238/dalevuforin.pdf
    • http://xubekif.braddykstra.com/uploads/1/3/2/3/132303189/kolifunefiz_pozopuzosesobix.pdf
    • http://lozedep.cerigrenelle.com/uploads/1/3/0/8/130814328/xugudamuzuposal-nubukaru-jatiru-xulanemumi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/75868173114.pdf
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/31864796865.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1095/files/chlamydia_trachomatis_medigraphic.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1319/files/bedelemojixuruxopuledaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/zirawegexus.pdf
    • https://cdn.shopify.com/s/files/1/0438/5875/5749/files/dodetopuliduluz.pdf
    • https://cdn.shopify.com/s/files/1/0436/2282/6142/files/72664382723.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/4761465420.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/south_park_asspen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0433/8774/8519/files/58351113854.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_off00004a0f.bin
6d34491c13da9cea1566d6c89197be1c55d6c0c3c7001369c3eeb20288b2c3e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0F 5364 bytes
font_01_sfnt_off00005c4d.bin
7c0bf8f353f04a2f5b54ae47bd1856dfa7654296bd658bb56f4f4fe25fe37475		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4D 9860 bytes

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