Malicious PDF — malware analysis report

Static analysis result for SHA-256 af833121357888b4…

MALICIOUS

PDF

73.3 KB Created: 2020-08-14 03:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c6f1c31de7cb606b6479659c8393f14 SHA-1: 152071fb50fa5610ee7ebc5950d00e3bde37604d SHA-256: af833121357888b4e0f754c3bdf20dc6f09d34286cbffd8a915f7ce22b2f2f78
128 Risk Score

Malware Insights

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

The PDF contains a lure referencing 'Ignou ba 2nd year registration form 2018' and embeds a link to a known malicious redirector. The PDF also functions as a link farm, directing users to numerous external PDFs, many hosted on Shopify. The primary malicious link is https://ttraff.com/pify?keyword=ignou+ba+2nd+year+registration+form+2018, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other embedded URLs.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=ignou+ba+2nd+year+registration+form+2018
    • http://files.chslibrary.info/uploads/1/3/1/3/131384025/3483551.pdf
    • http://files.patdbuchananeportfolio.com/uploads/1/3/1/4/131437980/1345641.pdf
    • http://xazefexug.dsrgolftournament.com/uploads/1/3/0/8/130814855/zaripozimamolevefi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/dalikawake.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3605/files/ansiedad_psicologia.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/79414489938.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/98065848757.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2063/files/visasiwutiwawefagetes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4673/1930/files/rilonubutosakezivana.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/69981593658.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/1321029052.pdf
    • https://cdn.shopify.com/s/files/1/0439/7318/1598/files/mebafejudusajudonule.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/39369379506.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/atualidades_2020_em.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/ganipij.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba7a.bin
e7ce22c7ab57c202a014b452bb33022a4580b35f22a6983670e9e60a5cfeef4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7A 5892 bytes
font_01_sfnt_off0000ce83.bin
28c7691791438195966969839c0f5b15d518ce4f9b297a031f671b4c31c7b003		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE83 10456 bytes
font_02_sfnt_off0000f26e.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF26E 16164 bytes
font_03_sfnt_off000107bf.bin
c759dc55a4f5b46339faee898d420b8ed8ae04769135fa9975fe34ec3fc1bb41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107BF 3968 bytes

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