Malicious PDF — malware analysis report

Static analysis result for SHA-256 043026f1b9364883…

MALICIOUS

PDF

53.2 KB Created: 2020-08-10 11:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 977c05986eab1210a522c253f64a343d SHA-1: 67716f80ad5d803f683e92d78f6f99f8d7b936e0 SHA-256: 043026f1b93648831428565d5a33fd99db6018c7034bd90d5c4f08d2fe4a3afb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that leads to a redirector, likely intended to lead the user to a malicious site. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content.

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=comparative+superlative+exercises+pdf+2+eso
    • http://files.hawaiisportsofficialshalloffame.org/uploads/1/3/1/4/131452953/bipowizat_vatuvige.pdf
    • http://files.robbinsnestcollectibles.com/uploads/1/3/0/7/130739678/939016.pdf
    • http://womivepet.naramatachildcare.com/uploads/1/3/1/6/131607600/6371825.pdf
    • http://getupip.trailblazersunit.com/uploads/1/3/1/6/131606552/sizofoforofegiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3751/files/bel_ami_livre_de_poche.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/pabuvon.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7826/files/71371431379.pdf
    • https://cdn.shopify.com/s/files/1/0430/4633/8709/files/arduino_beginners_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0436/1325/7885/files/xadimizezasiwasogosemovu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5199/files/25583901102.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/87394227062.pdf
    • https://cdn.shopify.com/s/files/1/0432/8987/0491/files/pafuwojabede.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/fetaniwazibejopefi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/terrence_ross_contract.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6140/files/zezewifub.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/nexofosaxuzefabogezi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084b8.bin
c540d13f0ecd914d0079d4b6b6847138ae082f97158eafcc34de8873a8c574a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B8 5464 bytes
font_01_sfnt_off0000973f.bin
ed715e252e27edd723f5936f723a3ab97d616b94fb4c4f01950c4345b5781c90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x973F 15572 bytes

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