Malicious PDF — malware analysis report

Static analysis result for SHA-256 73eb6f666e844ce1…

MALICIOUS

PDF

49.4 KB Created: 2020-08-09 12:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b08c5a6efbc4e13794f8cc39951219e7 SHA-1: d46249e26dd47f3cf012591b7bc995e973404e9e SHA-256: 73eb6f666e844ce1868c1f305c81d6a7fc76932d73e9dc49955d13a7c8b538a3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=angles+in+parallel+lines+gcse+exam+questions+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into clicking it under the guise of providing exam questions.

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.ru/pify?keyword=angles+in+parallel+lines+gcse+exam+questions+pdf
    • http://regeka.miramarbarra.co.za/uploads/1/3/1/1/131164250/sojesap.pdf
    • http://files.key2evolve.com/uploads/1/3/0/8/130874318/zasabuxemer_xawapikiguromik_balasoge.pdf
    • http://files.grassrootsarts.org/uploads/1/3/1/3/131380485/mapok.pdf
    • http://files.herbyagnew.com/uploads/1/3/1/3/131380305/aad93126db9d351.pdf
    • http://files.michellejnettles.com/uploads/1/3/0/8/130873826/781962.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/mowuf.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/jopepowagedajamovokug.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3005/files/36431973764.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/lekan.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/tidulakurobikedijof.pdf
    • https://cdn.shopify.com/s/files/1/0435/0659/8040/files/srimad_bhagavatam_in_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/50046595334.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3398/files/vovojonarogaroxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1358/files/solidworks_bicycle_design.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/12490692141.pdf
    • https://cdn.shopify.com/s/files/1/0437/2522/6133/files/bofiminugegusizasoja.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/98323871988.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_off00007931.bin
798f672c047ac18b05661ea658700358266104aedac365099a4520f8e35316c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7931 5660 bytes
font_01_sfnt_off00008c6a.bin
927b02e44a57361e4e48e5b37adedabff2d972d820c912efd3d2825b52d2c07d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6A 13948 bytes

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