Malicious PDF — malware analysis report

Static analysis result for SHA-256 281c2bbc4deb83f4…

MALICIOUS

PDF

49.9 KB Created: 2020-08-09 06:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16caa7763dc7fb945276f9b7198397f1 SHA-1: 6b61aafd15006adea6d33c45286076600ad22e3f SHA-256: 281c2bbc4deb83f4dd6b3eeceef175f745d46186e3b092d0213986971c45af28
128 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. The document body, though heavily obfuscated, contains the target URL and appears to be a lure related to 'assessment of learning'. The presence of a malicious redirector link indicates an attempt to lead the user to a malicious site.

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.com/pify?keyword=assessment+of+learning+1+pdf+gabuyo
    • http://files.fluidplay.co/uploads/1/3/1/0/131070336/03ea8408cc359f.pdf
    • http://menifa.sjsbeacon.com/uploads/1/3/0/8/130814297/6879907.pdf
    • http://files.macdesignthinking.com/uploads/1/3/0/7/130775583/5ce345486.pdf
    • http://likozezak.homedalefarmersmarket.com/uploads/1/3/2/6/132682883/5395699.pdf
    • https://cdn.shopify.com/s/files/1/0436/2400/5794/files/miduxafezurog.pdf
    • https://cdn.shopify.com/s/files/1/0451/3752/6949/files/accountancy_comprehensive_project_for_class_12_cbse_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/41479872504.pdf
    • https://cdn.shopify.com/s/files/1/0448/2102/0834/files/adobe_creator_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/davip.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/23282119243.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/electric_current_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0436/1070/1981/files/nukuvirokafukedusexen.pdf
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/fejurudu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0431/5329/3469/files/types_of_audio_visual_media.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007aa6.bin
072e88f6d7948b25985567385856e0ef7447a7acab2993b2df84144ecb53069e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA6 1708 bytes
font_01_sfnt_off00008314.bin
e5e14aebad258f702099c095f74a092ecd4ebd3038bf2e2595db00b3ae821bd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8314 5644 bytes
font_02_sfnt_off0000963f.bin
2b95cdde2b5d091d4d965a8c47f856ddd8190157ed9ccb5626054466362c2510
pdf-font-stream PDF embedded font (sfnt) at offset 0x963F 10612 bytes