Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54e905cd24f6969…

MALICIOUS

PDF

49.3 KB Created: 2020-08-07 05:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d98e37361b7ea0f147f664036b833c7d SHA-1: 6d0178c0b3ec509c58fe625876ef4dc97f532a7e SHA-256: c54e905cd24f69695d4f5856f332f9dce2be48f892e9567168c62b1d4e6ffde5
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'ttraff.com'. The document body, though malformed, suggests a lure related to 'management of accident and emergency pharmacy pdf'. The presence of a malicious redirector indicates an attempt to lead the user to a harmful site, likely for further exploitation or credential harvesting. The ML classifier strongly supports the malicious nature of this PDF.

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=management+of+accident+and+emergency+pharmacy+pdf
    • http://files.microneedleregulatory.org/uploads/1/3/0/9/130969209/giwuvizalapunemaf.pdf
    • http://files.jodtforum.com/uploads/1/3/2/8/132814048/mavojanazotinizewo.pdf
    • http://files.mountainview-artglass.com/uploads/1/3/2/7/132740541/fd835c4ab698.pdf
    • http://files.unleashyourlight.org/uploads/1/3/1/4/131406288/nagetafat-dalatisenon-teguvuvudewo-bizavumanepetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/53880413544.pdf
    • https://cdn.shopify.com/s/files/1/0436/0214/9539/files/wumujobedarog.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/mastering_manga_with_mark_crilley.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/1200433164.pdf
    • https://cdn.shopify.com/s/files/1/0445/6588/9188/files/different_branches_of_philosophy_and_their_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/girudibuge.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/rakivowizomikigudemi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/33530660777.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/buzavolabubuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/kevaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/52333559760.pdf
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/tesla_model_x_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/92530996665.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_off00006d27.bin
8f00e5684ac39e2e5bd68946f402a3d3f8ff67c881aed9655451e805a3c1de5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D27 5468 bytes
font_01_sfnt_off00007fb4.bin
b5fc317363e835baf7f3bb40dff43fe795a7e2aade529cbcd9b762a2e61374a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB4 10120 bytes
font_02_sfnt_off0000a285.bin
ebaa9d42c58e3fd25c8264bcf4ef2319fee467c92cf53dcc1f377a20fc8d39b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA285 16148 bytes

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