Malicious PDF — malware analysis report

Static analysis result for SHA-256 accb02bfdecd769e…

MALICIOUS

PDF

66.7 KB Created: 2020-10-29 01:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 605522a107df7a4649b9f87b516d4955 SHA-1: ef91e734cd82b8dc25da8c6b8e6a649d7f9b29c2 SHA-256: accb02bfdecd769ecc9aef3d8ef02231f9ad364e88a7ab7b3201c55d4d892d53
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, with a critical heuristic identifying it as a malicious redirector link farm. The primary link directs to 'https://ggtraff.ru/123?keyword=gay+sex+positions+pdf', which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to drive traffic to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ggtraff.ru/123?keyword=gay+sex+positions+pdf
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/6784764.pdf
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/xawamowexijeto.pdf
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/luvavedefafa.pdf
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/kosifumure_waselil_pepizul_lutubopeki.pdf
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/1015687.pdf
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/defelux.pdf
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/mapuv_nozufamufiredin_xerurefuxirin.pdf
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/mixabokika-xanadujane.pdf
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/2ca4dcb14d4f0ff.pdf
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/vafunajisenasotudaz.pdf
    • https://gagumosesixibo.weebly.com/uploads/1/3/4/0/134018544/mugufepasa.pdf
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/xesuzuniromolu.pdf
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/4952b.pdf
    • https://ramipataxeki.weebly.com/uploads/1/3/4/4/134483057/318477.pdf
    • https://ladofozaser.weebly.com/uploads/1/3/4/3/134334290/madujajokup.pdf
    • https://sidunaxegizu.weebly.com/uploads/1/3/0/7/130776644/3846284.pdf
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/denununewojijikogor.pdf
    • https://zavegaligap.weebly.com/uploads/1/3/4/4/134499553/busipibovusutumodag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/henghuili-files2/up_board_class_8_english_grammar_book.pdf
    • https://s3.amazonaws.com/muvarelo/1791669029.pdf
    • https://s3.amazonaws.com/kavitokolezub/jotowuzabumubavevubelefe.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000996b.bin
105225691bca56706fceb790559ca2e4cd52da69b7a38ad489f88e392e1892bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x996B 5412 bytes
font_01_sfnt_off0000ac67.bin
b712e965ca47ca567241e619a33a24078d415ca494258cb1f634717b398fd8b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC67 5108 bytes
font_02_sfnt_off0000bdf5.bin
8919fcd2eee37727b773802f5dcba150c0d2ab443f767e0722d4bcd5bede8245		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF5 12024 bytes
font_03_sfnt_off0000e403.bin
43abdffe25d981d327729ba15b4430d76a67d5b2bbd55e70939ca9d2c9253b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE403 16648 bytes

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