Malicious PDF — malware analysis report

Static analysis result for SHA-256 80021007e1abbcec…

MALICIOUS

PDF

45.9 KB Created: 2020-09-16 14:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f52ef2249fac4aee192b13369a846df2 SHA-1: 9c5b85adfd11ad06ff4eac90c8b34616e06f0f53 SHA-256: 80021007e1abbcec3ff395c3b438943d9168ddca983b4561037c1c60f18ac16d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.me/wix?keyword=how+to+get+free+diamonds+on+choices+2019'. Additionally, the document body, though heavily obfuscated, contains this URL and a large number of other PDF links, suggesting a link farm or redirection tactic. The ML classifier also strongly flagged this PDF as malicious.

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.me/wix?keyword=how+to+get+free+diamonds+on+choices+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cf5e1cb3-eb9c-4654-ab14-786af26157a7.filesusr.com/ugd/0fdb6d_874bf76ccfd74e8c9f55f20452fcc2dd.pdf?index=true
    • https://091f2adf-6abd-4a87-affd-0cf64f697b86.filesusr.com/ugd/bc0b97_534f947693684c74b39c804f7afe06bc.pdf?index=true
    • https://85576c21-dd12-4486-a6e1-e0c446d866d4.filesusr.com/ugd/440e29_35a34dd8391b43d5a19915778c6ca10e.pdf?index=true
    • https://1ec44e47-b545-4667-9151-f1e1be153ca6.filesusr.com/ugd/3a38e0_45b595f5ceaa4affbfcab147de8571ff.pdf?index=true
    • https://f9eee19c-31ce-4ab3-8d88-8d951cd99ff9.filesusr.com/ugd/3a38e0_3f4cbedd6dec4ee59111221966b13d97.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0465/8174/3783/files/android_1_modded_games.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wozofedotomutigetipire.pdf
    • https://cdn.shopify.com/s/files/1/0429/2509/7126/files/bitlife_ios_version_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0461/3216/6824/files/lifolawezexopujoxi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/fefowidupo.pdf
    • https://dfc2da15-3e06-4407-8d79-034527622b2c.filesusr.com/ugd/ced2dc_21558a20ef244c47ad60450a04b9b229.pdf?index=true
    • https://d63270ad-0122-408a-907a-fb41ca4bae62.filesusr.com/ugd/c5d40f_8d613205b5d8411080629113fe485273.pdf?index=true
    • https://0be524e8-091d-4725-a303-1c6d45b72838.filesusr.com/ugd/277b62_4adf1305e1ad4ad1b07c1c735dc3151d.pdf?index=true
    • https://86db7f38-6c29-4fce-85bf-58bce509b503.filesusr.com/ugd/6f9b04_2cafa685013f44e3bf1d54b56bc4fcae.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073d1.bin
6db96296edaa6d74ef13f0211b7d46af82a63c8dbdc79279480335f468982d56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D1 5940 bytes
font_01_sfnt_off000087fa.bin
25afb5ad65e79f0f992e61d2900b75ac9ab6f1fada813d99e640e29e37338fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FA 10132 bytes

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