Malicious PDF — malware analysis report

Static analysis result for SHA-256 9373f95e4e322bc3…

MALICIOUS

PDF

51.8 KB Created: 2020-08-17 08:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb16fae7bc259d3e013d81ad8a81d0b6 SHA-1: a8e97a00e2e52ebf3250e827aee7c7a3ec2d4685 SHA-256: 9373f95e4e322bc344509ae2c6bb73a0c08bdf27f76e68c7e356b535b2b47168
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a 'download' lure and urgency. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating an attempt to drive traffic to malicious sites. The primary malicious URL identified is https://ttraff.ru/pify?keyword=workbook+software+free.

Heuristics 5

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=workbook+software+free
    • http://files.gravitymech.com/uploads/1/3/0/7/130776619/gomerolu_natukexisonoxu_dusukugaluli_daxapumeru.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9377/files/e_marketing_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4299/files/sotedif.pdf
    • https://cdn.shopify.com/s/files/1/0441/1251/1128/files/apkmirror_pokemon_go.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/89824462776.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0070/files/advertising_and_ideology.pdf
    • https://cdn.shopify.com/s/files/1/0434/7789/3270/files/26793565960.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/79220039995.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/wabovetoton.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/pizivonujeribobageroxewaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/82511157715.pdf
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/sharechat_app_kannada_jio_phone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/digalikerewuxajevukadud.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_off00007ed6.bin
4465cf038c9678aeb481ae605c9b22af5a677bebe18302207389d1b12062de9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED6 4672 bytes
font_01_sfnt_off00008ee2.bin
558dfe250a1fedff474e31db002039001f505e3603aad3f4d96ab341671863a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE2 10936 bytes
font_02_sfnt_off0000b445.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xB445 4324 bytes