Malicious PDF — malware analysis report

Static analysis result for SHA-256 83155964226f815b…

MALICIOUS

PDF

46.4 KB Created: 2020-08-19 13:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6576b847b4ab45b31809d0fb3710025 SHA-1: b535ebee8522178390824aae74317e1ee1a82e33 SHA-256: 83155964226f815bb60bc7c03f94dc222309356d80bc76eddff1426c7b8e7546
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.ru/pify. This technique is often used to obscure the final malicious destination and potentially evade initial detection. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points towards a content-driven lure.

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.ru/pify?keyword=form+feed+meaning+in+c
    • http://buwasopo.solsticemoons.com/uploads/1/3/1/4/131453323/3232949.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/27571129794.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/avalon_hill_gettysburg_1977_rules.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/brandenburg_concerto_5_viola_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdf
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/murebim.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/tubagonogexofufiponetuma.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/rozesodika.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83300066175.pdf
    • https://cdn.shopify.com/s/files/1/0434/5669/2390/files/honeymoon_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/tuwetoga.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/32239527760.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/4979718102.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/investing_for_dummies_4th_edition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a5.bin
0343a173edd56ff489a0d14c4272b24c48691b3cbbf05cc024275aa225e742c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 5084 bytes
font_01_sfnt_off000074da.bin
02ae8d1f4c42a923bad4be0a080ca280eeef5151953c4a1cb69818faa736547a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DA 10196 bytes
font_02_sfnt_off000097f1.bin
72c9679aee0c6547d4f777b323a4eeffdd99704caa724a829079276c0c08fac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97F1 16108 bytes

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