Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c2f26a9aa6aa5a…

MALICIOUS

PDF

42.9 KB Created: 2020-08-17 09:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3201193b4129fba4227dfbac70fbc9dc SHA-1: f1cc754d72d2e0ffac863828ab0064f5acbfd909 SHA-256: 23c2f26a9aa6aa5a6f8fa116a497017143babd53df7b7754374539e5bdd1617f
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=jasper+report+community' which is flagged as malicious. This indicates a likely phishing or malware distribution attempt by redirecting users to harmful sites.

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=jasper+report+community
    • http://files.grizzlygrover.com/uploads/1/3/1/4/131410545/1592793.pdf
    • http://lalif.duetocanela.com/uploads/1/3/1/6/131606490/a9189f.pdf
    • http://mixojat.stephaniekfit.com/uploads/1/3/0/8/130814328/7531700.pdf
    • http://files.luminatwellness.com/uploads/1/3/1/4/131454102/8361111.pdf
    • https://cdn.shopify.com/s/files/1/0433/7749/2118/files/nuxerunobipinijiwavemes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/tufinefibawufido.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4170/files/zerikironej.pdf
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/86999834796.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/fosajumerepotufekag.pdf
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/vazedoganimipefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/8757906048.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/12072654217.pdf
    • https://cdn.shopify.com/s/files/1/0434/9768/5157/files/vawodevamawenidutef.pdf
    • https://cdn.shopify.com/s/files/1/0427/7442/9852/files/1mm_aluminium_sheet_for_sale.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_off00006d35.bin
319704ac9714d5ed3d8d51c97ed868bc64cf9e74f225bbf78b54540c57d81f06
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D35 5136 bytes
font_01_sfnt_off00007ea2.bin
3f94b688dc1c599412a2ad90844d9922b6cc2a32aabbc50a17dc0874ae0e737d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA2 9452 bytes