Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2476a0e6ec7120…

MALICIOUS

PDF

43.4 KB Created: 2020-08-07 21:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e0fac426e09d8f9fa10af3ecdafb2ef SHA-1: 1faaa219033ef5c04b9b0f264c87df799703bd89 SHA-256: 5d2476a0e6ec712044a31adfe849bb20ebb5d8c5a48caa415f0f908272c52760
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, masquerading as a breast cancer classification document. The document body and embedded links suggest a lure to a link farm designed to redirect users to potentially malicious content. The presence of numerous PDF links and a redirector URL indicates an attempt to distribute malware or phish for information.

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=breast+cancer+classification+pdf
    • http://files.letsgetrealinc.org/uploads/1/3/2/3/132303126/74f26.pdf
    • http://momut.hawaiianislandjewelry.com/uploads/1/3/1/3/131381428/bipewu.pdf
    • http://demorixi.leisuretravelsrilanka.com/uploads/1/3/0/8/130874207/a398eb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/vaferuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/9348/9832/files/momobarosudowu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/32301719152.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/83407973911.pdf
    • https://cdn.shopify.com/s/files/1/0432/1158/7752/files/kaxalej.pdf
    • https://cdn.shopify.com/s/files/1/0433/6553/1806/files/7824581255.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/kebiririzu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/nosuwufodekevibifi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4459/2021/files/bremer_stadtmusikanten_text.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/88206360689.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62894204366.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/45123605864.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/tefufamuk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c50.bin
b6ef94a23c6606277346f7de8e8ecbc16f87de7aac19c3e543d9671f95b5764b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C50 5200 bytes
font_01_sfnt_off00007e10.bin
799a65031a00e42902f575341facfb26ddc96f565e92560c5bf004903bd85771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E10 10088 bytes

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