Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1cf269ac1f2ba6…

MALICIOUS

PDF

44.4 KB Created: 2020-08-15 07:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5a2a1e6f8bdbaa1a601a5bd2e1f4892 SHA-1: 4261b83453f1c1e736570ddabd9251c35283b944 SHA-256: 5d1cf269ac1f2ba60e9aa723cad5a0f900ea0fe09b125d563b1a1eaa78ace719
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a URL designed to look like a quizlet answer key. The document body and embedded URLs confirm this lure, directing users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=fema+is+100+c+answers+quizlet
    • http://mefumigu.medicinemakermama.com/uploads/1/3/1/8/131856408/593bce1a7fee4.pdf
    • http://files.westtechmobile.com/uploads/1/3/0/8/130813778/tewowaju.pdf
    • http://zunam.mindymajors.com/uploads/1/3/0/7/130739704/7867629.pdf
    • http://files.universalengravers.ca/uploads/1/3/1/0/131070113/gumimurojudada_boxewowope_sudikobug_kojovopidumez.pdf
    • http://suwopotub.trinidadrifleassociation.org/uploads/1/3/1/1/131164250/gozume.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/3371/4070/files/bitowezubew.pdf
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/36869537868.pdf
    • https://cdn.shopify.com/s/files/1/0432/2705/4237/files/afars_appendix_ee.pdf
    • https://cdn.shopify.com/s/files/1/0438/8595/3192/files/zenatilinowumunerozolol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/cara_membuat_link_google_formulir.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/mojofinupobopofebetulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/69283508976.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/1654313777.pdf
    • https://cdn.shopify.com/s/files/1/0431/4470/8245/files/rofafepos.pdf
    • https://cdn.shopify.com/s/files/1/0440/6863/4789/files/manual_huawei_p10_plus.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062de.bin
5b0a710e5ce6084eae996e90790f11642c44e69167b5c7870cd9a3b15674bce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62DE 5132 bytes
font_01_sfnt_off00007451.bin
6243b7373adefa0c8719f6fe0c6847f86e596917c052ebf8bebd805cdc7e6300		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7451 9984 bytes
font_02_sfnt_off0000965f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x965F 4324 bytes

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