Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b66f04e0a1e0c73…

MALICIOUS

PDF

44.3 KB Created: 2020-08-10 22:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a1358bebc86d22dd0da2bacba2652f1 SHA-1: 7e2e6cef22dbca8464f5610b081b67c674db5692 SHA-256: 8b66f04e0a1e0c737757532a8e37e0bd599f291beb01d14a6597b8646ccd039a
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a high number of external links, indicating it is part of a link farm. One of the embedded URLs, 'https://ttraff.com/pify?keyword=calendario+juventus+2020+19+pdf', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other benign-looking Shopify links, suggesting a lure to redirect users to malicious infrastructure.

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.com/pify?keyword=calendario+juventus+2020+19+pdf
    • http://files.advisorybikelanes.com/uploads/1/3/0/7/130775784/wemekosebevafuwowura.pdf
    • http://files.gregoryvann.com/uploads/1/3/0/9/130969985/wivexepitidajeb-bidurumumobi-nepujikibibis.pdf
    • http://files.youthdentalconference.com/uploads/1/3/2/3/132303068/suxerujefakobusidom.pdf
    • https://cdn.shopify.com/s/files/1/0452/7095/8241/files/chevening_scholarship_form.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/larurureluxenatoxusilin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0181/files/vupadetisefiboziluneb.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/66138403856.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/litivufotifej.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1416/files/intel_r_hd_graphics_3000.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7451/files/67141620790.pdf
    • https://cdn.shopify.com/s/files/1/0437/6576/0151/files/lepivodopedisozedo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/xibokefutojaxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/pesererakujazupamijujo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/tokeseramisimedepo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/jogixofofotize.pdf
    • https://cdn.shopify.com/s/files/1/0430/8316/9943/files/dnd_kenku_race.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8118/files/cadette_badges.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/lumewovemivibugowo.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_off00006b15.bin
cb247ef6e7f7e3526f73135afc5aea04b2046702925d7a57c77550287bcb82a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B15 5560 bytes
font_01_sfnt_off00007e12.bin
bac0c429641f0a25250d73f99bf822a992d7cae36be6d1c10d4e4068aa4eda5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E12 11180 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.