Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a009211b4456f59…

MALICIOUS

PDF

46.3 KB Created: 2020-08-06 05:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30dd3da412662e047b231a046e7e275a SHA-1: c951bbca4ee5dc980cfdb127943a208124f2c8f9 SHA-256: 1a009211b4456f5932522696ace9253ede0cbf503508991ce5f1e96aecf4a808
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'electronics and communication engineering books pdf download' and includes the malicious URL. This suggests a social engineering attack aiming to trick users into clicking the link, likely leading to malware download or a phishing page.

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.cc/pify?keyword=electronics+and+communication+engineering+books+pdf+download
    • http://files.northlandlodge.com/uploads/1/3/1/6/131606128/laxebikosumerigiwale.pdf
    • http://fakupi.lamosproductions.org/uploads/1/3/1/4/131407164/bifogiduwuvokiz_livame.pdf
    • http://files.universitytools.org/uploads/1/3/0/7/130740183/miruzogil.pdf
    • http://files.tarjac.com/uploads/1/3/1/3/131383575/pisopag-doximubuvew.pdf
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/business_proposal_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/examen_ceneval_derecho.pdf
    • https://cdn.shopify.com/s/files/1/0440/8541/1990/files/lufegivaxawupefoximejujat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/informatica_tutorials_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/11726896786.pdf
    • https://cdn.shopify.com/s/files/1/0429/3243/7151/files/jiwezo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6885/files/xewoguwefexuvedawubutafom.pdf
    • https://cdn.shopify.com/s/files/1/0433/1362/7294/files/visafabejupor.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/13774267949.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/97023202585.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/28269034698.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_off000069cc.bin
0d7c91a86ae9e7cab0190acacf895e3b09f33021496d2fedeb57d38574bbe9ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CC 5728 bytes
font_01_sfnt_off00007d46.bin
89454d8ece1be00d2333aac76955f46ed17c4d141322e635bf27f42efb43e54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D46 2116 bytes
font_02_sfnt_off00008712.bin
ac60af43c009eb25bd6fca07892de8d5e6125d3812d9f11f7bb3ca2571140f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8712 10100 bytes

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