Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6bdc138a73045d…

MALICIOUS

PDF

41.7 KB Created: 2020-08-16 00:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e700939b4620aa4349f25fbb709c28bd SHA-1: 3ef6165a0bf7285a3894bfcc7e671dfb92df203c SHA-256: 8e6bdc138a73045def3f70e5f15ae1578acb08ea15e8bffd026aa455128c3fd1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Applique embroidery s' and the malicious URL, suggesting a lure for users interested in embroidery. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many pointing to Shopify, likely to obscure the malicious redirector. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the document.

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/pify?keyword=applique+embroidery+s
    • http://rawudisux.augustushoffman.com/uploads/1/3/0/8/130814328/kapufu.pdf
    • http://xoteba.mondulkiritour.com/uploads/1/3/0/9/130969747/fde6d62ce6b14c.pdf
    • http://vowawe.janetandrews.co.nz/uploads/1/3/1/4/131437987/5ab1fb188.pdf
    • https://cdn.shopify.com/s/files/1/0435/5329/2440/files/51851587096.pdf
    • https://cdn.shopify.com/s/files/1/0432/7522/3206/files/risk_of_rain_ukulele.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/scratch_card_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/pimirexuwaludumidix.pdf
    • https://cdn.shopify.com/s/files/1/0433/9076/3175/files/96471013212.pdf
    • https://cdn.shopify.com/s/files/1/0434/2284/3036/files/xexiterilebaluginufetog.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/cadet_college_sargodha_admission_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/melebenudowu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5694/files/ranger_s_apprentice_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1408/files/tizatabilubur.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_off00006552.bin
4565a707a9fcba2ceb4b9feacd5e825a899ea8da98e0f12a95f0bfee1115c962
pdf-font-stream PDF embedded font (sfnt) at offset 0x6552 5252 bytes
font_01_sfnt_off0000770f.bin
a20aca2bd6e86122a3776ad2f683ae6a792f647fde525cec144b40879027156e
pdf-font-stream PDF embedded font (sfnt) at offset 0x770F 10252 bytes