Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f6e34b50645fc7…

MALICIOUS

PDF

86.6 KB Created: 2020-07-30 03:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3767e39796db05c9dcd9bf0ff95c0878 SHA-1: db908f54c0cdc6fffb3917a4c673aed7563aa086 SHA-256: 93f6e34b50645fc7b94ab9c068efed598bfbcc8b0380d68688bc323f24926c0c
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, suggests a lure related to 'Air pollution project for college students pdf'. The presence of a link farm and a critical heuristic firing for malicious redirectors strongly indicates an attempt to direct users to harmful sites. No scripts were extracted, but the PDF structure and URL analysis are sufficient for this assessment.

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=air+pollution+project+for+college+students+pdf
    • http://files.one-sixteenth.com/uploads/1/3/1/1/131164472/b0c8dfa.pdf
    • http://files.chickenmullfestival.com/uploads/1/3/0/7/130775050/motorazavi.pdf
    • http://files.maclachlanmeadows.com/uploads/1/3/1/4/131409498/9443244.pdf
    • http://files.tellmemo.eu/uploads/1/3/1/3/131398333/debabuwim-tidowo-bubit.pdf
    • http://files.amyjlane-instructional.com/uploads/1/3/2/7/132740467/525610.pdf
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/tutafefomedifipunopofixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/xilidefavexuxabotixo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/85568755295.pdf
    • https://cdn.shopify.com/s/files/1/0429/5163/9196/files/sagok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22537170944.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/89490348010.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/litajelaxipamuzelaros.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/56684773256.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/6584134271.pdf
    • https://cdn.shopify.com/s/files/1/0430/4925/5061/files/20874176807.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/85885385690.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/setof.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_off00011723.bin
56eb883a44ef6f9d2dda05412dba15836064839297f4824d08ee408615e51de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11723 5060 bytes
font_01_sfnt_off0001286e.bin
36d3eddfde1d08eb401ebe15c68659ebb9ab021ac79cb18391d20a193de9233e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1286E 10636 bytes

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