Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9a76e2081297df…

MALICIOUS

PDF

47.7 KB Created: 2020-09-16 19:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 026011c72b9e3c7597043727339afe45 SHA-1: 7fc48896f42f6b979fe68ac44dae34c9ddd6404e SHA-256: 6b9a76e2081297df74d341340be0beac3c247674e79019ac1678ebd7ccde2c7e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier also flagged the document as malicious. The presence of a link farm suggests an attempt to drive traffic to potentially malicious or phishing sites.

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.link/pify?keyword=7%252F4+as+a+decimal
    • http://files.themodernweld.com/uploads/1/3/1/4/131453902/bipomuk-temulijosa-vidorurasa-mozuk.pdf
    • http://files.tuscanoaks.org/uploads/1/3/1/3/131398541/sufiwate.pdf
    • http://juvolis.bunnyrancher.com/uploads/1/3/2/7/132710567/kazakuxerokada.pdf
    • http://degogofo.dabesthawaii.com/uploads/1/3/1/4/131438580/acfc00ade31.pdf
    • http://files.milliontreeinc.com/uploads/1/3/1/4/131437123/zegido-tobumolagiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://da427fc8-4962-4148-a6a9-6f3b3bc7df62.filesusr.com/ugd/3ddeef_eb6e0c6409ac4a07aa15a9edaf3bfc08.pdf?index=true
    • https://a35c3095-4a52-4e9e-b6c6-32c517e3c7d2.filesusr.com/ugd/0cd3a8_cf6e8fd7080d42ada6a958f584c6f597.pdf?index=true
    • https://d94d29f9-4843-4286-82ac-f14ee017ebc8.filesusr.com/ugd/a13bc2_91864a5f6b8945b98e4493a4b63391d3.pdf?index=true
    • https://24a47f48-3a82-43cd-95ea-e1af283c25c3.filesusr.com/ugd/70e5f7_490d5fb514854499b6e08ef832546fd1.pdf?index=true
    • https://b93aa6cc-4c7f-4817-b466-2ee927b19e9a.filesusr.com/ugd/3826db_7e2101f8cfb5454791131afa3e817558.pdf?index=true
    • https://132a8eaf-a8f9-406b-86ec-4f13833a49ec.filesusr.com/ugd/4c7633_91d42ed6edbd457e8d130e4e24d014d7.pdf?index=true
    • https://877cfc73-2659-40c3-8e9a-bb4b57240f60.filesusr.com/ugd/610d21_50e7b275308344ea82075e6e49b5d1cc.pdf?index=true
    • https://c5da6b1c-4da3-4830-8ccf-ddea9b0744bf.filesusr.com/ugd/1cc777_bdde1c562b444cdfb767d6e952c22cce.pdf?index=true
    • https://a8aff6b0-f62a-4ec5-a1ab-ea66a72cfbfe.filesusr.com/ugd/d7d6cd_24e1b9d084fc4b9896690946b99f220b.pdf?index=true
    • https://f64aef82-f009-453a-b9a1-5c97f0234f44.filesusr.com/ugd/8acad3_b7db4e10e11641088fb3977421dd34bb.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/1687/0293/files/presentation_in_english_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/8144/1181/files/blank_iwcf_kill_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/consciousness_definition.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_off00006674.bin
c5ac1805d9d27bc270330f0c244e2fde121ef416c6d3dfb392b8694f768598db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6674 4588 bytes
font_01_sfnt_off0000760d.bin
bc15626d7a8bbb977688587874cbada8c441047b871aabbfb043757117c3a7f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760D 14312 bytes
font_02_sfnt_off0000a378.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA378 4324 bytes

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