Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d9bc04e586c24b…

MALICIOUS

PDF

45.8 KB Created: 2020-08-07 06:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abdd4f5984feed682b5a24c232eed600 SHA-1: 5452d2b942f2443b33ab7cec611bef29cc86dd63 SHA-256: 11d9bc04e586c24b895b7ec4bf866246a3c72920956db25ddd7e23fb22507d78
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at `ttraff.com`. The document body, though malformed, includes the same URL, suggesting an attempt to lure users to malicious infrastructure. The ML classifier also strongly indicated maliciousness. The presence of embedded URLs and the link farm behavior suggest this PDF is part of a larger campaign, likely for phishing or distributing further malware.

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=ancient+egypt+social+structure+pdf
    • http://files.ororossodelmonferrato.com/uploads/1/3/1/1/131163632/1350963.pdf
    • http://files.sustainabu.org/uploads/1/3/2/6/132695582/lopijuwawomupepajo.pdf
    • http://files.dippedindope.com/uploads/1/3/1/3/131379353/fodibomibojok-womuzusom-xivubowerunu-tapakesoka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/6296/5912/files/nonolusapapenopepeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/download_single_file_from_github.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/84130775150.pdf
    • https://cdn.shopify.com/s/files/1/0432/7450/2312/files/15169574745.pdf
    • https://cdn.shopify.com/s/files/1/0437/0530/3205/files/lerusudufulipokudixakaxis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/28510972195.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/masewobelitaxelak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/nezisela.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/71924918089.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/tuzonexilamemivar.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/23513050784.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_off00006742.bin
8b9d4fc94db7663cb67cf333310823cd54c526669635e218c94c543c43bfe20b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6742 5296 bytes
font_01_sfnt_off00007958.bin
6aea9442ff155094cac112f42f236c5ab983c379934a299f01a1d45c59cdfa19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7958 10264 bytes
font_02_sfnt_off00009c32.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C32 4324 bytes

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