Malicious PDF — malware analysis report

Static analysis result for SHA-256 e706d286100449d4…

MALICIOUS

PDF

46.0 KB Created: 2020-09-02 07:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f830a54fcf71c239b363eebcee4c7da6 SHA-1: d0a407084258a42d1a22d6acd2a7c4975ae69373 SHA-256: e706d286100449d47389ae0465085a336192a008e35a47c3e7e1f577cc85a340
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a document about diabetes mellitus. This indicates a likely phishing or malware distribution attempt. The document also hosts a large number of other PDFs on Shopify domains, suggesting a link farm used to improve search engine ranking for malicious content. 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.cc/wix?keyword=diagnosis+and+treatment+of+diabetes+mellitus+pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2982/files/92720045007.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/87666522219.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/fubozaturasibite.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/pathogenesis_of_viral_hemorrhagic_fever.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/europe_airport_codes.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6803/files/android_activity_class_source_code.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/titowe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/hull_city_stadium_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0769/files/informacion_sobre_carpincho_animal.pdf
    • https://cdn.shopify.com/s/files/1/0439/6243/3694/files/adding_fractions_with_different_denominator_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0462/4131/7015/files/vokamubonukave.pdf
    • https://cdn.shopify.com/s/files/1/0463/3313/2955/files/69159661415.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/shell_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0462/8135/9520/files/scatter_plot_worksheets_positive_and_negative_correlation.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/dayforce_payroll_administrator_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/guxifixopo.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_off000075d6.bin
b19b3fc3bca8fb4841383ba16ab4fba1fe69d898275fad0bcbaf08ff38c06000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D6 5500 bytes
font_01_sfnt_off00008874.bin
5b84a3cd2105d3eccfa74b84a6e1ede3c37cdf9fab01eb7df9781dc55c1b3fdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8874 10052 bytes

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