Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b537ad47dd5cf8…

MALICIOUS

PDF

44.9 KB Created: 2020-08-01 17:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f0448823897ed1bfb009f1811ce3548 SHA-1: 59bd45d78399e4571f0d6fd8a572fd204ea30ab0 SHA-256: 86b537ad47dd5cf8289adc3314fa84284546f1e608093c314e3a54982d2adb89
194 Risk Score

Malware Insights

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

The PDF document contains a lure for 'Minecraft mods for Xbox 360 download' and embeds numerous links, including one pointing to the malicious redirector ttraff.ru. The SE_CLICKFIX heuristic indicates the document attempts to trick users into executing commands, likely to download and run a second-stage payload. The ML_NYX_PDF_MALICIOUS flag further supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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=minecraft+mods+for+xbox+360+download
    • http://files.remotesensinglab.org/uploads/1/3/2/7/132740375/xagutofanikekus.pdf
    • http://files.discoversafedriving.com/uploads/1/3/2/6/132682892/nutoxalukan_pesatiwu_sideropa_juwalolemiv.pdf
    • http://files.mikeflasterstein.net/uploads/1/3/1/4/131437680/5952768.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2783/9641/files/didivuzija.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/rujaxetutewidog.pdf
    • https://cdn.shopify.com/s/files/1/0435/8730/5629/files/66653770436.pdf
    • https://cdn.shopify.com/s/files/1/0433/8624/1189/files/riboxujisavapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/kumusuwixezebulon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/vafukizefizurelujifes.pdf
    • https://cdn.shopify.com/s/files/1/0439/2671/6584/files/52842992032.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/28705113329.pdf
    • https://cdn.shopify.com/s/files/1/0438/1048/8477/files/lojafesokodojel.pdf
    • https://cdn.shopify.com/s/files/1/0435/9595/6386/files/3656165303.pdf
    • https://cdn.shopify.com/s/files/1/0436/8121/8710/files/20802781060.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_off00006ff1.bin
0ae7a5bd7fd8be5998941e879dab786a70749b3840cfef2e843771c589102f4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF1 5932 bytes
font_01_sfnt_off00008425.bin
2fa29e7301e3f52414563a76b55e8489ffb06e43a52b76eb8af9e887261d341a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8425 10084 bytes

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