Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38380e7075d49a8…

MALICIOUS

PDF

35.0 KB Created: 2020-11-07 07:31:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fdd4a0ce7eb3e3d10028f311f3132d4e SHA-1: d31ee790045b71ebc585f44e5d680cef287c2bb3 SHA-256: a38380e7075d49a8d7fc4831925068629300d06fa5efee36ec1e912945cec594
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffine.ru/123?keyword=anna+isd+hr'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

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://traffine.ru/123?keyword=anna+isd+hr In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419654/normal_5fa0dc788209d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f94672f7c3cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459028/normal_5fa5a24aaf8cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5f9b5c364e250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410447/normal_5f977deb3f42b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_5f98a92c9fd9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_5f8a5d7d32b74.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/20e33b98-85e9-4173-91ab-0537b0c3c2d2/39352372263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446a8b64-531e-496c-8bb9-4240c4279327/5380915974.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/3588250136.pdfIn PDF document text
    • https://kebupud.files.wordpress.com/2020/11/16674380217.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/practice_test_7_reading_answers.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_off00004375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4375 4352 bytes
SHA-256: 2300490acb95585447d646b8953d6c1e234423c28251b7aa26f41d5ffc1718dd
font_01_sfnt_off000051ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51FF 9092 bytes
SHA-256: 95bf4463969652a086d52bcabe65e128b48b75bf126dce2388879677ccf04beb
font_02_sfnt_off00007104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7104 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c