Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ceec8cd9d1b181…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 02:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df5ff2717067190588f9bcd82b8d80bc SHA-1: 12cc092e908e08342d2a5b2a15e144c6941c799b SHA-256: b9ceec8cd9d1b18147387fccd135c0ee56a3075a1c85f1c0167045259240ebab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.ru, which is used to redirect users to other sites. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure for sheet music, likely to trick users into clicking the malicious links. No scripts were extracted, and the PDF structure itself does not indicate specific exploit techniques beyond redirection.

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=memory+andrew+lloyd+webber+piano+sheet+music
    • https://static.usrfiles.com/ugd/b8c837_6c3396a730224ef3be5a2a9c5f2265b8.pdf
    • https://static.usrfiles.com/ugd/067ecb_96c2fb18647b4a6c8894ebe6d64873c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd8e3d9ad5a3470aa862d8405275c42c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9631e454f8c64eb89350741a13eb1129.pdf
    • https://static.usrfiles.com/ugd/11f207_afba3ffdbf8a4ebeb05d1ef0f6cc66d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_65373540caa0459fa6610c8336131adb.pdf
    • https://static.usrfiles.com/ugd/77d535_cd4bdb606e0e45dd933e81e068835a03.pdf
    • https://static.usrfiles.com/ugd/b8c837_d57a875f48484ecb9c7ba2770793a251.pdf
    • https://static.usrfiles.com/ugd/b8c837_83c48d43239c4d2bab577530a053b922.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4aeacf440b9427d9770210312cc028b.pdf
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/fefonud.pdf
    • https://cdn.shopify.com/s/files/1/0437/4115/1386/files/margaret_atwood_the_testaments.pdf
    • https://cdn.shopify.com/s/files/1/0438/3725/9936/files/nodepedesizazibilujigudo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/4999/files/lean_organisation_management_techniques_unit_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/sefukatukam.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/71923751571.pdf
    • https://cdn.shopify.com/s/files/1/0459/2238/6069/files/grosvenor_capital_management_holdings_lllp_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/kukinig.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_off00005e75.bin
351ae06365649051590f528def42960bb057d474977635134e93a778b22449ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E75 5532 bytes
font_01_sfnt_off00007123.bin
f3e15b13496c966502cf4f7ebc0183f1855a87a2d2c4820df01a70e5009c4987		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7123 9896 bytes
font_02_sfnt_off00009318.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9318 4324 bytes

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