Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea18aa141c28740…

MALICIOUS

PDF

48.1 KB Created: 2020-11-01 15:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7fa0cd2af72bb21182f0b75265bfd020 SHA-1: 013f71a8ffb432235b2226f087dd7fd5c13a476b SHA-256: aea18aa141c287400feeaf702db105ed5710ff40f87c1b0a7850a5e7a4f55996
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?keyword=read+allegiant+online+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/123?keyword=read+allegiant+online+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f95e8c1b04af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403533/normal_5f926cce97b9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f8a65c9f238a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_5f95cd0093d5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ed7dfedf-a021-485d-903d-4651aa0b8204/60503360632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147db207-5228-4f49-8ea7-322559d4ff78/measure_and_construction_of_the_japanese_house.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9428/5730/files/visit_drift_painted_durr_burger_dinosaur_and_stone_head_in_a_single_match.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfa2222-7a80-4959-9874-a40e84d5ca0e/4070997457.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/68731130867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6824073-b252-4c5c-9a1b-bf067cda86ac/71092374113.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/surah_al_waqiah_terjemahan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6151/6737/files/android_studio_3.0.1_download_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b964079-6e0b-499b-99a1-8c5b355c6e2a/whitespace_is_not_your_enemy_fre.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7185 4732 bytes
SHA-256: 27068f8947a60a7aedc6dd30cdecc864281b95ccb80ba4bb11adbf7a02635184
font_01_sfnt_off000081b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B4 10532 bytes
SHA-256: 117def034f977a736b58b11d33d28961436991f963e3f280d4435b56de513cf5
font_02_sfnt_off0000a59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA59A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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