Malicious PDF — malware analysis report

Static analysis result for SHA-256 146ff9d06e1ac2a2…

MALICIOUS

PDF

37.6 KB Created: 2020-09-19 13:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ed45823a93e981f03ebae62d98808ba SHA-1: 686624c0542523469436f6727995dbb9767a1240 SHA-256: 146ff9d06e1ac2a2cbdbddce44693999327911d31af8c38010d9799a26f1a51f
162 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though obfuscated, contains a URL that matches the redirector link, suggesting an attempt to direct users to malicious content. No scripts were extracted, but the presence of numerous external links and the malicious redirector link strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=24+hour+grossmont+class+schedule
    • http://files.naturallyyoursbyisabel.com/uploads/1/3/1/1/131163635/vorij.pdf
    • http://files.glutenfree-woman.com/uploads/1/3/2/6/132696060/guxenatonugut.pdf
    • http://files.now-hope.org/uploads/1/3/0/7/130776673/mitawarezub-retemepaxaxas-mosiduga.pdf
    • http://nifine.empirecoffeecompany.co.nz/uploads/1/3/2/6/132682156/7f527d061674d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d83658f8-5531-4212-8faf-895d09c50c8e.filesusr.com/ugd/e948c1_b0a5102770fb4759b10a33213d6b1f73.pdf?index=true
    • https://49142cac-1926-4797-afeb-6b9a2b29b14b.filesusr.com/ugd/d6af85_ef58c50d2f5a49f3b5e11250be28cd7b.pdf?index=true
    • https://290d28b3-a959-4170-b80e-5ffe959b65a2.filesusr.com/ugd/735189_12094d41bf054669a7b7a18c7b6b9ed8.pdf?index=true
    • https://912ea0fa-dba7-459e-a279-376bb4f5f392.filesusr.com/ugd/7a7fb1_2ba7d6e90d7d4a219b69742c9d1ebea6.pdf?index=true
    • https://4e86e19d-59ae-4561-9760-db0e0232d838.filesusr.com/ugd/1a94e8_da7da655ca3a4d46a06c9f6af05c3123.pdf?index=true
    • https://6b020ebd-b3c4-450f-b9eb-e5e040e5cae5.filesusr.com/ugd/8bc2a6_817d6b5a088146bb8a01649b976f888e.pdf?index=true
    • https://50172aee-2df2-4f86-9532-8644110befb0.filesusr.com/ugd/0b46e6_593a787b654a4270a4be1a749f6d256f.pdf?index=true
    • https://b4619b8c-d19b-451b-8736-e687500fa1be.filesusr.com/ugd/e3c460_5f7f9ea9d00f4f73ae29a98f166479ef.pdf?index=true
    • https://b1ad1fe0-d424-40d1-8884-d5b5d907a59d.filesusr.com/ugd/6fd45c_7601759b149340aa8c5f1f8d76f277f7.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/6312/3874/files/97874640588.pdf
    • https://cdn.shopify.com/s/files/1/0462/3109/3397/files/bsac_incident_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/23516660131.pdf
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/vafite.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_off00005439.bin
839b8ad8406a992d270d9377d332a3b8251ce763119651e4799c9a02def3308e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5439 5480 bytes
font_01_sfnt_off000066b8.bin
2e71c5ca65797528977b7bf27d47314f099c84b109acd21f5dfdf4a36b9004d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B8 10236 bytes

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