Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e0849230b6bd20…

MALICIOUS

PDF

33.5 KB Created: 2020-08-13 23:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6e44f6c8ab75dfb6da6ff261c5c277f SHA-1: 54de2d614f5e145be4c7cbaec5c2d925d7913da9 SHA-256: 56e0849230b6bd20e3069cec9ca962332324b23c27992396f2397956c6c8d5c5
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a high number of embedded links, many pointing to a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The document body contains garbled text but also includes the URL 'https://ttraff.cc/pify?keyword=brother+label+maker+templates', suggesting a lure related to label maker templates that redirects to malicious content.

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=brother+label+maker+templates
    • http://tituboxim.fredoniaenactus.org/uploads/1/3/2/7/132740405/7655219.pdf
    • http://files.hyesookchoi.com/uploads/1/3/2/7/132740482/bilemibalinekubo.pdf
    • http://files.oneontapubliclibrary.org/uploads/1/3/0/7/130739525/defuzokuturenomifu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3520/4511/files/adding_and_subtracting_fractions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9759/files/padazipenun.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/71806140566.pdf
    • https://cdn.shopify.com/s/files/1/0430/3355/9203/files/57447553302.pdf
    • https://cdn.shopify.com/s/files/1/0435/0482/8580/files/77738611368.pdf
    • https://cdn.shopify.com/s/files/1/0433/5167/0943/files/security_camera_configuration.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/98883680482.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/49219491162.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1702/files/kunuloxekarosiwug.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/www._nvsp._in_form_6_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/funutelule.pdf
    • https://cdn.shopify.com/s/files/1/0437/7015/1061/files/rojiralunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/muwuxomirugarejetanuba.pdf
    • https://cdn.shopify.com/s/files/1/0435/5565/1743/files/73612273621.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_off0000481f.bin
6330c43763ec3c3f1d3ad2db3bf8ea2532d99d89054e0c3947d5ec0c24ea5d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x481F 5312 bytes
font_01_sfnt_off00005a01.bin
5fb74dee5e75672cc8bb6090a962712f1f14bdf448f0436a21b3ceed09c9975f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A01 9172 bytes

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