Malicious PDF — malware analysis report

Static analysis result for SHA-256 3717e187b6ad95be…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 20:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dc2397f8f3ce92df8d1d8fc8bba4106 SHA-1: 6087db9102edb311fca213de4c67785192c58c91 SHA-256: 3717e187b6ad95be623c1c26d8ab9fd1d57088dc7b2baa98737da0236c7ed6d3
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=essential+mathematics+textbook+for+senior+secondary+school+pdf, which is also listed as a malicious redirector. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, likely to improve SEO for 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.com/pify?keyword=essential+mathematics+textbook+for+senior+secondary+school+pdf
    • http://files.yellowpixiedust.com/uploads/1/3/0/8/130814043/2225189.pdf
    • http://files.nanba-ryu.com/uploads/1/3/1/3/131398428/d375e2f3.pdf
    • http://files.cafegratituderecoverystore.com/uploads/1/3/0/7/130740363/lotegomur_zububitoz_nizelemabuj_taxezavaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/59641911937.pdf
    • https://cdn.shopify.com/s/files/1/0436/5369/3593/files/los_compas_y_el_diamantito_legendario_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kijajakunij.pdf
    • https://cdn.shopify.com/s/files/1/0444/8839/2871/files/what_is_origin_in_git.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/nixisofujitipadupubaxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/59520822559.pdf
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/industrial_safety_equipment_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/jubivivoniviwiki.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0743/files/archimedes_principle.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7491/files/85044096787.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4179/files/fomexuruvejubu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7022/5574/files/lasuxabimadabozekit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d66.bin
b3893ac6e08882547c67ef46e443cf980c191607b84af4672049d357a01d7f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D66 5516 bytes
font_01_sfnt_off00006fed.bin
5481f887e9b5b5759232574729f53f953066ec50812b0bf3d264ca5e46c18bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FED 9624 bytes
font_02_sfnt_off000090db.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90DB 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.