Malicious PDF — malware analysis report

Static analysis result for SHA-256 89340be8654831ca…

MALICIOUS

PDF

48.4 KB Created: 2020-08-01 10:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c55e1501daaa2db5fb2098919fcc9fcc SHA-1: c02faecb1e600de2ffac55b785478376d021ab2a SHA-256: 89340be8654831cac3ccff19e9815d19beabf79c242c0b6248a470802ccbd6ff
152 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 of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=how+to+restart+minecraft'. The document body, though heavily obfuscated, contains text related to 'how to restart minecraft', suggesting a lure to trick users into clicking the malicious links. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=how+to+restart+minecraft
    • http://files.spiralofaccountability.com/uploads/1/3/1/8/131871433/janedisajitazoz.pdf
    • http://files.aaronchamberlain.com/uploads/1/3/1/6/131636764/6144290.pdf
    • http://files.ayohonduras.com/uploads/1/3/1/3/131380342/gepuruwezujaxek.pdf
    • http://files.jenniferwleighton.com/uploads/1/3/0/8/130814115/zesunewaforiteturove.pdf
    • http://files.stgilespres.org/uploads/1/3/0/7/130739522/poxeloripafak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/44687579.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/jomokululedes.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/nowugefugagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/wiripunos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/fikixubuxizagekat.pdf
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/66709688429.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/nicomachean_ethics_sparknotes.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/37293860796.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7969/files/rekalanunozukawudodaji.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4514/files/4889568081.pdf
    • https://cdn.shopify.com/s/files/1/0436/7558/2617/files/61669827862.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/dimelezubidudujoga.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/5965419566.pdf
    • https://cdn.shopify.com/s/files/1/0437/8601/0776/files/vancouver_time_zone.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_off0000730d.bin
c3a9d1e92fd1506b22d37b8b5b1c37b58385d82cbcdf30f4c3cb25b92387e991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730D 4836 bytes
font_01_sfnt_off00008365.bin
fd12b8c23ad5e0672b6eaf8c54027d2c12eb7b5b2096095b0c48f09ec68ad22a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8365 10136 bytes
font_02_sfnt_off0000a607.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA607 4324 bytes

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