Malicious PDF — malware analysis report

Static analysis result for SHA-256 44cfe2789a4e56e7…

MALICIOUS

PDF

42.5 KB Created: 2020-08-03 18:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96548933860ac01f7be21b3c4d328f61 SHA-1: 26325ffabd13cece81b91afb81d443d71b8254b7 SHA-256: 44cfe2789a4e56e7617f4d9d0b4924ab09bfd26e78d0b8a2f4b196fcce95c393
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious content. The document body, though heavily corrupted, contains the text 'Adding and subtracting integer word problems pdf', which likely serves as a lure to disguise the malicious intent.

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=adding+and+subtracting+integer+word+problems+pdf
    • http://files.centurywestneighborhood.com/uploads/1/3/0/9/130969565/69ee56293dd0ce.pdf
    • http://files.greenleaforganizing.com/uploads/1/3/0/7/130775063/228903.pdf
    • http://files.m2reporter.com/uploads/1/3/0/7/130776164/jibiwenaxamavi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/26321318862.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/93467974983.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/83001940966.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/novefifijuxinitetiwilo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4104/5145/files/sawoxosupebelobizinosabez.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/69440686583.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/davuzimeropudaxetoronuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/tuviburor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lavatorumagenikezelun.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/gekotalunogorefopa.pdf
    • https://cdn.shopify.com/s/files/1/0447/3788/8410/files/el_acoso_escolar_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0428/6752/3743/files/78882840135.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/69617132678.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/codex_gigas_english.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_off00006538.bin
85542b37fb70823b5f1178825726d58d7ba9973a4dd89c2ef3d6bfd3bc1b34d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6538 5696 bytes
font_01_sfnt_off0000789c.bin
db07e7cb3a7cc40c4c36b811618d10bafd2920b533b155965514cb43dea808af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789C 10692 bytes

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