Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff4750643be2bd1…

MALICIOUS

PDF

42.2 KB Created: 2020-08-11 17:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0885ccaf41535b9cac73ddcc3a7c1f00 SHA-1: d5b0b4ebbd94848686760fd41c2934aa56f0361e SHA-256: eff4750643be2bd1c39fdcaa177cc9339536b484ec8b6aa72553ca1236e78cb2
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'general agriculture books pdf download' and the malicious URL itself, suggesting a lure. The presence of a link farm and a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK strongly indicates a malicious intent to redirect users to harmful sites. No scripts were extracted, limiting the analysis to the document's structure and embedded links.

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=general+agriculture+books+pdf+download
    • http://files.eatingdisorderdallas.com/uploads/1/3/1/4/131453109/debosatopumexam.pdf
    • http://files.climbonmaps.com/uploads/1/3/2/6/132681322/d7d05.pdf
    • http://lebovon.monicaleeux.com/uploads/1/3/1/0/131070786/zidomufajiramoj-bevimodiv-rizonolofapit-sotaruvajodawes.pdf
    • http://sapipibo.hsexquisitecloset.com/uploads/1/3/1/6/131606289/botoluz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6685/8408/files/terumujozerufat.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/51856583958.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/42438527811.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/bossa_nova_chords.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/tilasufamovavaweba.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2951/files/16465862876.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/come_disegnare_figurini_di_moda.pdf
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/bpsc_answer_key_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/retepemaxugifelajirewaje.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/roletawogosupag.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/fibibuvovid.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/54465377032.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/bioplastico_a_base_de_cascara_de_mango.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_off00006258.bin
ce3531492d7afef4e30a5ab60dc72f042973307067c3d02ec8cf4604cf45af2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6258 5652 bytes
font_01_sfnt_off000075b2.bin
fa7fb6d4f9e8ca28b0f1526833b4fc808873955b4a78ad5826175ef701373f95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B2 11788 bytes

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