Malicious PDF — malware analysis report

Static analysis result for SHA-256 585eeb92c02de3b1…

MALICIOUS

PDF

34.3 KB Created: 2020-08-21 19:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c158069d14b7af4e9d17deb5356e56f8 SHA-1: 5e0f9e886f51f48625110a5d5712b668098aa2ef SHA-256: 585eeb92c02de3b1f8762cd7479ae382ebb276710cb05f492c6b24fcecc82e49
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute malicious content. One prominent link, 'https://ttraff.com/pify?keyword=hooke%2527+s+law+experiment+lab+report+theory', is identified as a malicious redirector. The document body, though partially corrupted, includes the same lure text and URLs, reinforcing the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=hooke%2527+s+law+experiment+lab+report+theory
    • http://lugaje.trojerestaurant.com/uploads/1/3/0/7/130740563/tofudus_borajisu.pdf
    • http://tujax.tattooxman.com/uploads/1/3/1/0/131070718/5901564.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/avg_pro_full_apk_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5764/files/bolabufuferakun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/mathematical_puzzle_answer.pdf
    • https://cdn.shopify.com/s/files/1/0435/1416/7450/files/68670310128.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5871/files/faduteguxomapagatuzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7023/files/presentations_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/79522405853.pdf
    • https://cdn.shopify.com/s/files/1/0438/2041/7181/files/we_re_going_to_be_friends_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/40613478131.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000489e.bin
8f751cd61801b99696af534c8f8f1ec00f353fac5c8e8fb4e17d6a38b23baf15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x489E 5520 bytes
font_01_sfnt_off00005b54.bin
972dc61700eb19ecba88a3b30f72b18b861199544ca9a5c73f24948ed1ba9bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B54 9708 bytes

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