Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5e89582c78358a…

MALICIOUS

PDF

43.7 KB Created: 2020-08-01 17:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05a903e0f210366987b1b0561c9a7a31 SHA-1: e095518892d7cf30b2ff0fe897bce0458a270875 SHA-256: 5d5e89582c78358a9ab098d9458aca8a94173afa670e24dbd4c95f03df3316e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, disguised with text related to "Discord role ideas". The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, supporting the observed malicious redirector.

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.ru/pify?keyword=discord+role+ideas
    • http://files.rokalumnaedst.org/uploads/1/3/0/9/130969190/tibimave-gefej-gumibenazaxosi.pdf
    • http://files.home-space.co.uk/uploads/1/3/1/8/131856306/55836f6da1073.pdf
    • http://files.bentoncentralffa.com/uploads/1/3/1/4/131437044/7709705.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/9930/7673/files/73646946814.pdf
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/41817821742.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/goxosiwifite.pdf
    • https://cdn.shopify.com/s/files/1/0434/8516/7766/files/viponenogawe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3330/3976/files/xuxijuxoperiragebaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/59150022421.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/zixoduwajezute.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/world_of_tanks_test_servers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.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_off000062ee.bin
628f9d80b3cb8b89c703f8edd8877815f971c214aae488967c6142c2d01095f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x62EE 4536 bytes
font_01_sfnt_off00007254.bin
5b7f5cd49a829df400a2e8b9aef064f17aba8a9dee811bd6a773aa38ddc9a1ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x7254 9980 bytes
font_02_sfnt_off0000947d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x947D 4324 bytes