Malicious PDF — malware analysis report

Static analysis result for SHA-256 434b414a667320e7…

MALICIOUS

PDF

45.7 KB Created: 2020-08-20 01:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1428184400da8ddcaa56bb3b9a11e259 SHA-1: bb68c33e49a928e33871bbe8b0bb602901d128cd SHA-256: 434b414a667320e75be207ffabdfb9ce9f990139e43c4ce926030f321d64e241
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a malicious redirector link disguised as a "Ccvis caste validity form". The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic fired, pointing to the URL https://ttraff.ru/pify?keyword=ccvis+caste+validity+form. This suggests the document's primary purpose is to redirect the user to a malicious site, likely for further exploitation or credential harvesting. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=ccvis+caste+validity+form
    • http://wewoje.360entertainmentllc.net/uploads/1/3/0/7/130775085/jobudozebu-zazaxu.pdf
    • http://files.lifestylejewellery.com/uploads/1/3/0/9/130969577/e56f792e9fc7.pdf
    • http://files.nlspartners.com/uploads/1/3/0/8/130814052/kozasazeketutepowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/32141324278.pdf
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/65871398291.pdf
    • https://cdn.shopify.com/s/files/1/0437/5950/1464/files/bteb_result_2020_8th_semester.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/form_130-_u_texas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/jizumud.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/nefisopobotug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8326/8257/files/caltrans_traffic_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9910/files/cambium_force_180_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/bawejulagekowiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6901/files/44532326694.pdf
    • https://cdn.shopify.com/s/files/1/0450/9266/7544/files/mokunefedaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/63334585899.pdf
    • https://cdn.shopify.com/s/files/1/0437/4216/7189/files/oxford_american_handbook_of_clinical_pharmacology.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/palidovuj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000682d.bin
bd97e0cd1d7f19ba9dba5beae8702c15f33e2748f8f3cea7a6ee8b38b2e4048a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682D 5032 bytes
font_01_sfnt_off00007953.bin
254affd01c31d26abbb045c00412314a7740bb13f318cd53318169e010c0a61b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7953 10084 bytes
font_02_sfnt_off00009be9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE9 4324 bytes

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