Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1013a95ff945dc…

MALICIOUS

PDF

127.6 KB Created: 2020-08-01 21:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcbb01b2124e7818d822fbbff35d110b SHA-1: 472ccdb4515a1490d4ae4efb3951bf3c1610dc01 SHA-256: 5e1013a95ff945dc097774899166fb09600d6922542479ec690ad877710f03a9
154 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Roblox troll gui script' and embeds a significant number of links, many pointing to external PDFs hosted on platforms like Shopify. One critical heuristic indicates the primary link leads to known malicious redirector infrastructure. The ML classifier strongly supports the malicious verdict. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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=roblox+troll+gui+script
    • http://files.adsregion11.org/uploads/1/3/2/6/132695698/fe175f952.pdf
    • http://files.brave458.com/uploads/1/3/0/7/130740530/1a547351fac9.pdf
    • http://files.mik9ac.com/uploads/1/3/0/7/130775071/nalomafavasorode.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6728/4383/files/34498703551.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/54100200924.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/rosumepunodapadewulubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31178329868.pdf
    • https://cdn.shopify.com/s/files/1/0433/2273/6798/files/84031898987.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/xurorureloto.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/teroka.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/wamamofamasa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/93468457176.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/lolimex.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_off0001aa9c.bin
30a634cf39abfe40a7ba888f38f557b62da9573d7dc3dd44beb326d4eeab4415
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA9C 5108 bytes
font_01_sfnt_off0001bc1c.bin
9e8ac442630acb527267dc0e210551d90d3da4a874eaae40b69caf98d865aa8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC1C 17004 bytes