Malicious PDF — malware analysis report

Static analysis result for SHA-256 8982c7bf8091fa6a…

MALICIOUS

PDF

40.7 KB Created: 2020-07-31 21:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dc5a5256857909c875be426b6d5bd1f SHA-1: 846b0c2864be88649b0629c77a36815bb136b2e5 SHA-256: 8982c7bf8091fa6a3104132603eaf324ead08806d6d2bf001e3d24cc630f03d4
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits a PDF link farm behavior, with numerous links to external PDFs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=anita+moorjani+dying+to+be+me+pdf, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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.com/pify?keyword=anita+moorjani+dying+to+be+me+pdf
    • http://files.thedwnews.com/uploads/1/3/2/7/132740275/a7b68ac15a.pdf
    • http://files.zepreloading.com/uploads/1/3/1/3/131380052/4701938.pdf
    • http://files.orgorg.co/uploads/1/3/0/8/130873851/mibutalu_najes_gifafilubekixu_tejasit.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/9906299192.pdf
    • https://cdn.shopify.com/s/files/1/0438/3778/4229/files/21058371639.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/guzaxolisisezupusodipos.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/54162540143.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55781022724.pdf
    • https://cdn.shopify.com/s/files/1/0433/6661/3141/files/72584825371.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/99640803851.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/70372478086.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/92289756516.pdf
    • https://cdn.shopify.com/s/files/1/0434/9978/2309/files/gulupukudafupude.pdf
    • https://cdn.shopify.com/s/files/1/0428/7361/8599/files/36183874021.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/sudotebo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2761/8209/files/19532899799.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/70401621227.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_off00006094.bin
66cb0b98bceca880647d71e94feb766aae9981f4f3c0e1d567c1666ce1212134		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6094 5460 bytes
font_01_sfnt_off00007321.bin
30c937fd5fc2c782d84de959953828a322f07ec24fad72e673b05661e955c71f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7321 10052 bytes

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