Malicious PDF — malware analysis report

Static analysis result for SHA-256 690754f34593fe09…

MALICIOUS

PDF

47.3 KB Created: 2020-07-15 22:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb5c4b4af260c7f4274136636f39d113 SHA-1: 884ea398ccc5047085bce19057bd020b36390324 SHA-256: 690754f34593fe09f335e69e9e349e48a6deb9e319833a36f63669e060a5fa92
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links that redirect to external websites, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a manual, likely to trick users into clicking the malicious links. The presence of numerous PDF links further indicates a link farm or redirection strategy.

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/wb?keyword=unold%2068511%20manuale%20italiano
    • http://files.maryzambello.com/uploads/1/3/1/3/131379181/5637671.pdf
    • http://files.dorsethps.org.uk/uploads/1/3/0/7/130776555/b9667c8.pdf
    • http://files.rockymountainalpacas.com/uploads/1/3/1/3/131383318/bexuvujipinul-boxux-gariloza-fagilopiji.pdf
    • http://files.thecrimsonworm.com/uploads/1/3/2/8/132815183/07745090ead.pdf
    • http://files.hornsbyptsa.org/uploads/1/3/1/3/131379434/bomujakurufilo.pdf
    • http://files.ranchosandiegopopwarner.com/uploads/1/3/1/4/131412235/1994b7bb7e746c2.pdf
    • http://files.coastaleducationservices.com/uploads/1/3/1/6/131606954/zekemodazizezek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://xevabutifun.files.wordpress.com/2020/06/95797298939.pdf
    • https://wakogokanexu.files.wordpress.com/2020/06/zedojivoluzisetulok.pdf
    • https://tetakorure.files.wordpress.com/2020/06/10487779024.pdf
    • https://zuzilunox.files.wordpress.com/2020/07/49675286973.pdf
    • https://runamuked998523811.files.wordpress.com/2020/07/pogam.pdf
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/zavebogufuxake.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/43560876829.pdf
    • https://cdn.shopify.com/s/files/1/0429/9233/7059/files/xolekenejasato.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/73817942961.pdf
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/22214896667.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/40063055747.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_off00007aec.bin
8345c9c2a7da3d8883ee4f966e2fa9630ab8d8c23762d67df3aed8b0de8fd606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEC 5092 bytes
font_01_sfnt_off00008c2a.bin
79410205cfab64156f4404d25518c0257e4a45c905da94faf6f2193d1e95174e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2A 11016 bytes

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