Malicious PDF — malware analysis report

Static analysis result for SHA-256 570887bac4055482…

MALICIOUS

PDF

35.4 KB Created: 2020-08-31 07:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cea05b8db43cdfd19864f9d47c0da1c0 SHA-1: 7d6abc7f6fe479d1e2cf8227de65436323fdf75e SHA-256: 570887bac40554829afaacfa8d4571d7d0b7cf4c74562768915d0a6fd1a3c803
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.cc/wix?keyword=cabron+golan+music+zippy, which is likely used to redirect users to a harmful destination.

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.cc/wix?keyword=cabron+golan+music+zippy
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/ffmpeg_compress_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/sciatic_nerve_glides.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7222/files/83261748052.pdf
    • https://cdn.shopify.com/s/files/1/0458/5426/1401/files/administrator_job_description_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/zilojuxaxipifaxulozepaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/64474740726.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/jixupifi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3913/6661/files/77305581510.pdf
    • https://cdn.shopify.com/s/files/1/0433/8571/6886/files/vadonezogasowokaralagal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/9352434012.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/vemulodusobifafuwuribaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/nibizebakux.pdf
    • https://static.usrfiles.com/ugd/822ecd_f4432a4f749f4f33a8e8cd95147e2db5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0575b038a9734f3d914b65e489cd4a48.pdf
    • https://static.usrfiles.com/ugd/238140_5dc3aa56b8cd4874957528a6319162ba.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ba9.bin
185a92005d9fff7f1ef787ffa101188521b8f5c557d52128e31c580b68b4bcd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA9 5452 bytes
font_01_sfnt_off00005e2e.bin
6d0ba3a82b78fafe549dccdc6744d3fe784cd48a19a19bd171fbfc53a820d170
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2E 10124 bytes