Malicious PDF — malware analysis report

Static analysis result for SHA-256 be35718aece16b49…

MALICIOUS

PDF

39.8 KB Created: 2020-08-18 23:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ecdcd233827f8604151f167d62505f4 SHA-1: 53322adb98e08c7f448bbf2644f2ad85f9743b55 SHA-256: be35718aece16b49d2313d10b38d2eace5e160c88d03fdac937919ff6aeb3c15
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with the primary URL pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to manipulate search engine results or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, and the document body is largely unreadable, but the link farm and redirector are strong indicators of malicious intent.

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=nice+guidelines+liver+function+tests
    • http://files.nailtalklive.nl/uploads/1/3/1/0/131070646/8ae1a040.pdf
    • http://xerasom.primaryrocks.com/uploads/1/3/0/7/130738993/0a9da.pdf
    • http://files.colleenscoachingcorner.com/uploads/1/3/0/9/130969703/2536747.pdf
    • http://zezirep.jimmyjazmes.com/uploads/1/3/1/0/131071243/dogoruwugozozom_vagupexoragi_butikefewow.pdf
    • http://files.relationship-lab.com/uploads/1/3/2/7/132741322/xuworiwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutuxajaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2697/9739/files/19509000902.pdf
    • https://cdn.shopify.com/s/files/1/0431/9484/3298/files/depukamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/48476589181.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/94050875000.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/42434221618.pdf
    • https://cdn.shopify.com/s/files/1/0459/9663/8365/files/49796053914.pdf
    • https://cdn.shopify.com/s/files/1/0435/5833/8715/files/tugidamoliket.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/gofamaguxegurikuzawe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/jrf_keto_meal_plan.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3081/files/fodufomexijeriwitowud.pdf
    • https://cdn.shopify.com/s/files/1/0439/3123/8568/files/86105520865.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/72259712176.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_off00005df2.bin
4fc2eaec055a66bdb506c45e738c4a041709b831c2758535afc6d419afb070a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF2 5008 bytes
font_01_sfnt_off00006f17.bin
620a9820b0fe3d154040f0d2c39fe336b89f38405337a61cef1a7c459ec2f488		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F17 10244 bytes

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