Malicious PDF — malware analysis report

Static analysis result for SHA-256 f477e3588d6ad22d…

MALICIOUS

PDF

37.7 KB Created: 2020-10-09 02:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b67ce256c7f49bf1b3cef199af395492 SHA-1: f9b54edc6666c2ea150911c1aa7f0a9c2c16f3b6 SHA-256: f477e3588d6ad22d0821f79bd799e96cef07cc4711abcedee1114ced60feaa04
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a link farm infrastructure. The primary malicious URL, https://ttraff.club/pify?keyword=lord+of+the+flies+study+questions+page+1+answers, is identified as a redirector, likely leading to further malicious content. The document body, though obfuscated, contains references to the study guide lure and the malicious URL.

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.club/pify?keyword=lord+of+the+flies+study+questions+page+1+answers In PDF document text
    • https://site-1038429.mozfiles.com/files/1038429/73520038971.pdfIn PDF document text
    • https://site-1039889.mozfiles.com/files/1039889/gikipo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3949/7112/files/62004216720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9828/5230/files/83576692243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/southglenn_denver_movie_theater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659ac203-162c-4014-876f-5dc512ddeaa6/zififiverozewekidovozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9166/6106/files/sea_world_ohio_boat_accident.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7160/5410/files/10774610189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6974/1983/files/root_beer_cake_recipe_from_scratch.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4060 5616 bytes
SHA-256: fd00ac27d43f2e79c1a208ee5708291f1804dba636b7869fcd4fa9690884619d
font_01_sfnt_off00005388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5388 6556 bytes
SHA-256: f052ec14d423201802ec8e703949efe8fca74df06431bbdfec3d6d01eb658f6b
font_02_sfnt_off0000697b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 9436 bytes
SHA-256: 7d0620be57bd1bf7ba3b151c18b69e819e1ef24ac6094354bd1c6e41446c104f

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