Malicious PDF — malware analysis report

Static analysis result for SHA-256 999df3ceba3b779a…

MALICIOUS

PDF

44.0 KB Created: 2020-08-12 21:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63d737c6950480d76871e00ada0cb34f SHA-1: b9a500eb8c0c43f407366842b8a1f23b88e12969 SHA-256: 999df3ceba3b779aef9b68f6d04a6c52c77bc2540e1df35797212504210a89c5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a link to a known malicious redirector, ttraff.cc, which is likely used to deliver further malicious content. The document body text, though heavily obfuscated, contains the same URL and suggests a lure related to "B tech subjects pdf". The presence of a large number of external PDF links also indicates a link farm SEO tactic, likely to improve the ranking of the malicious redirector. No scripts were extracted from this sample.

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.cc/pify?keyword=b+tech+subjects+pdf
    • http://files.ssaanewhaven.com/uploads/1/3/0/7/130775475/2246295.pdf
    • http://files.coolcaribbeanvacations.com/uploads/1/3/1/4/131406108/sirufetolen-tabov-supej-fupezoma.pdf
    • http://files.excellentwoodturning.com/uploads/1/3/1/4/131438692/3682014.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/43666737210.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52244446143.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/13997398048.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9730/files/63694632167.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/27915232557.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/jugosuvikukeju.pdf
    • https://cdn.shopify.com/s/files/1/0439/0020/7272/files/31548992515.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/mofebero.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2354/files/javesezirirezirexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/kelas_scaphopoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotalufakelani.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/mulurar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/tudigebezeradirib.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_off0000630d.bin
be1ac91a8288d8f8757757db7f676b80a1d97568a32da1cf1562bee8e777af40
pdf-font-stream PDF embedded font (sfnt) at offset 0x630D 4788 bytes
font_01_sfnt_off0000736a.bin
bf9ee4b7593ba2d5f2a506bc3654be65bcd1bc8496db9b99f08aaa89e5bd506e
pdf-font-stream PDF embedded font (sfnt) at offset 0x736A 9816 bytes
font_02_sfnt_off00009507.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9507 4324 bytes