Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1eb2bbed9483e2…

MALICIOUS

PDF

41.6 KB Created: 2020-08-31 18:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d940d6647b48c3672e4d54cabac5e34e SHA-1: d321a44d687a7d1bcb55bb5678a76dfdcf40a926 SHA-256: ba1eb2bbed9483e23d39b349d5172be5cd88b5b9f7d7f2b2fab333b7d3bb6d79
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains the same URL and text suggesting a lure for 'ps2 emulator for pc windows 8. 1'. This indicates the document's primary purpose is to redirect users to a malicious site, likely for further exploitation or phishing.

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/wix?keyword=ps2+emulator+for+pc+windows+8.+1
    • https://cdn.shopify.com/s/files/1/0438/6793/0789/files/menu_cetogenica.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/carbohydrate_metabolism_in_liver.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipudakafadaned.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/online_to_word_converter_ocr_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0462/2444/1498/files/home_baking_nacion.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8198/files/87513850324.pdf
    • https://cdn.shopify.com/s/files/1/0436/3668/7008/files/bioethics_journal.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/dizajuriv.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/2007_toyota_camry_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_563bce6c44624919b8f09561690b991b.pdf
    • https://static.usrfiles.com/ugd/87d215_8e8e6c1e7f9e4b6aada89f2e596667ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb29977c52a348d393c4cc9969d8b762.pdf
    • https://static.usrfiles.com/ugd/b88e3d_04f597efec6842b19477a67ec275968a.pdf
    • https://static.usrfiles.com/ugd/86319b_849df68369b5415ca960d41ec8be34fa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056f2.bin
93f5d91d21992dd26f168099d5a0a5fbb234681570185f8f5d5d0073ab3c1e91
pdf-font-stream PDF embedded font (sfnt) at offset 0x56F2 5804 bytes
font_01_sfnt_off00006ab6.bin
6a77f955d39b9d81e75477a2b3a68a06f90d7b352a411c8fd057aba46c531b2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB6 2236 bytes
font_02_sfnt_off000074cd.bin
c5fb97b2b8fc5e5fb1eed74274a6d2d0d1d659155cd08b8f8f4d547002e31693
pdf-font-stream PDF embedded font (sfnt) at offset 0x74CD 11040 bytes