Malicious PDF — malware analysis report

Static analysis result for SHA-256 6906f08487ab8b5f…

MALICIOUS

PDF

41.5 KB Created: 2020-08-14 05:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73845b5723469827e5b96ac8e1591a19 SHA-1: da85c924ed97b3e3c84c295d6b3423d19724fbb2 SHA-256: 6906f08487ab8b5f7a6602d2ccab6169080b04018ca8780aabf18e68ddf04c12
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=biodiversity+mexico+pdf, which is likely intended to lead the user to malicious content. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content.

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=biodiversity+mexico+pdf
    • http://batedame.laverdasthoughtsandmemories.org/uploads/1/3/1/0/131070420/7814416.pdf
    • http://bekejup.themaskcaraartist.com/uploads/1/3/0/8/130874153/5576c01a9b706.pdf
    • http://files.halcyoncenter.com/uploads/1/3/1/3/131380316/pasufowuki-nifozivatigorep-xuzedadanovaxew-xipeguxesatir.pdf
    • http://tuvatomu.tealelfs.com/uploads/1/3/1/1/131164250/dunamebus-kediwugun.pdf
    • http://files.magnuspolson.co.uk/uploads/1/3/1/8/131858287/939b4999a9d5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4003/7271/files/resiromojazesenefipunusa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/melojewojevojalov.pdf
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/tilavujukaxinovowi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/fipuzupaxixipumisiwowi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7800/6437/files/46710492092.pdf
    • https://cdn.shopify.com/s/files/1/0445/9751/0308/files/unisa_bcom_accounting_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/xafuxarosanod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45560821546.pdf
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/acidemia_glutarica_tipo_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/js_alert_yes_no.pdf
    • https://cdn.shopify.com/s/files/1/0443/9700/2918/files/total_gym_workout_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/51142726308.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_off000064ca.bin
9140e52ba88751783991206df45b45b553e8e085a2077de7fbc877245a1425c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CA 5340 bytes
font_01_sfnt_off000076f6.bin
7f272923c8a6d78967772621ddc6a4c83e6d47d84445bf567a1804849093b2dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F6 10104 bytes

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