Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe4a38393dea0cb…

MALICIOUS

PDF

32.1 KB Created: 2020-08-15 00:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1daa153be65ca8eedc35e5f28273bf54 SHA-1: c737e5994986917102721e0afb306d54d7960734 SHA-256: ebe4a38393dea0cba91ee089d5a48b9294ba027ee531f2ad4657e4e98630b537
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link, specifically pointing to 'https://ttraff.com/wb?keyword=yale%20conexis%20l1%20user%20manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs hosted on domains like cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of multiple external links suggests a delivery mechanism for further malicious content or phishing attempts.

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.com/wb?keyword=yale%20conexis%20l1%20user%20manual
    • http://files.sdbvl.com/uploads/1/3/1/4/131454816/bezabuxozizuluk_guzurila_jowaluvimiji_finixinemuvaxij.pdf
    • http://files.jbirdmultisportcoaching.com/uploads/1/3/0/8/130873877/27e66b.pdf
    • http://files.stevannovakovich.com/uploads/1/3/0/8/130874241/vewasamomuselus-fifobuwur-leluvogez.pdf
    • http://files.christierobinsonphotography.com/uploads/1/3/1/3/131380591/wuzopiwer_nejodivitorudu_xutalutiburof_lisojowesetola.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0433/files/kufawebe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0436/8410/2297/files/veletaselotuxilepowesi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9888/files/84192278757.pdf
    • https://cdn.shopify.com/s/files/1/0430/0455/9519/files/mupip.pdf
    • https://cdn.shopify.com/s/files/1/0435/1524/8794/files/descargar_biblia_plenitud.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/calculus_maths.pdf
    • https://cdn.shopify.com/s/files/1/0431/8081/8581/files/46507839821.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8939/3816/files/aeneid_latin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/sistema_angiotensina_aldosterona.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sabam.pdf
    • https://cdn.shopify.com/s/files/1/0432/5687/3128/files/4441677490.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044a8.bin
3252bdcfa21bba174c5b549df7ce8e0407260b7f0f7427218a1e690db5a9c373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44A8 5028 bytes
font_01_sfnt_off000055ab.bin
afe01543dc1b4612168f87898b497e2219555e9b93ca2c775cd1ef15ba2b2f86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55AB 8728 bytes

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