Malicious PDF — malware analysis report

Static analysis result for SHA-256 626ffb01253adec8…

MALICIOUS

PDF

68.9 KB Created: 2020-08-05 16:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67b373a7cb906f144795fa900615ce90 SHA-1: 72c5b13ec1251ec9e8bf2fede58a5f43dcb5cb9f SHA-256: 626ffb01253adec8f1276b4b4034df1410e9f5842018a0e0aad6854498df47c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a redirector hosted on 'ttraff.com', which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content. The ML classifier strongly indicates maliciousness.

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=risk+management+in+islamic+banks+pdf
    • http://files.warkprimaryschool.co.uk/uploads/1/3/1/3/131380158/3763230.pdf
    • http://files.aikenpsr.com/uploads/1/3/1/8/131872079/lazabudibinanet.pdf
    • http://files.worldofpeaceandlove.com/uploads/1/3/0/9/130969312/498de746ddf09.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/bagubotifedufusofufik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufotiniponekurek.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/factorio_blue_science.pdf
    • https://cdn.shopify.com/s/files/1/0435/7393/6291/files/61446762507.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1670/files/92595322990.pdf
    • https://cdn.shopify.com/s/files/1/0441/1867/1512/files/casos_practicos_de_auditoria_administrativa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/69792361771.pdf
    • https://cdn.shopify.com/s/files/1/0428/4373/4172/files/tukosefegodaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/lego_star_wars_games_empire_vs_rebels.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/wibesasonetolen.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/tomomojisezovisisozon.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1791/files/20245196535.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0611/files/82588876629.pdf
    • https://cdn.shopify.com/s/files/1/0430/9460/5975/files/kafoxuzoviluruxes.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf4c.bin
b7b6c1b479d2bb07ffe00d9eb43645f38feb4eb402dd1158bf4add6225e98124		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4C 5588 bytes
font_01_sfnt_off0000e244.bin
f7140493cd64957cffac2b2c3d6e53956a1c789c1b8096ad16ac45cf3a7a955f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE244 10572 bytes

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