Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7fd6991d862ee9…

MALICIOUS

PDF

70.5 KB Created: 2020-12-02 18:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f442709c7abc8549f26bc4086a95f511 SHA-1: b4aa97a0b74c29d67f81185dd849568798dc6bcf SHA-256: cc7fd6991d862ee95e678a1d6173399a18d8d71846ae1f18fc8d681ca5a38659
154 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://traffmen.ru/aws?utm_term=the+lottery+literary+analysis+answers'. This URL is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector suggests a phishing or malware delivery attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=the+lottery+literary+analysis+answers
    • https://cdn-cms.f-static.net/uploads/4481417/normal_5fb25a0b03cd2.pdf
    • https://cdn-cms.f-static.net/uploads/4393181/normal_5f8f16542c0da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/42d6bb0e-f881-49c0-a0f0-91963e83b70d/34510993951.pdf
    • https://s3.amazonaws.com/wipotegadodorek/seth_rogen_twitter.pdf
    • https://s3.amazonaws.com/kufazete/55503433818.pdf
    • https://uploads.strikinglycdn.com/files/d3e14232-f7ce-4b01-bd31-14701cd676c0/2210026782.pdf
    • https://uploads.strikinglycdn.com/files/efb9f86d-13d3-4666-a87d-636d005d626b/introduction_to_machine_learning_with_python_a_guide_for_data_scientists_1st_edition.pdf
    • https://static1.squarespace.com/static/5fc143d42cf09257bd6e7f78/t/5fc75ea28f07963615799e0f/1606901411076/67370237533.pdf
    • https://s3.amazonaws.com/tevomenil/celine_dion_courage_song.pdf
    • https://uploads.strikinglycdn.com/files/ee515ef8-aa42-4472-b10f-0fefe2438c27/541210624.pdf
    • https://s3.amazonaws.com/piradi/filezilla_server_for_ubuntu.pdf
    • https://s3.amazonaws.com/zizene/taxisedudadepedudadami.pdf
    • https://s3.amazonaws.com/migivewuwe/bivenodanopolasulorejumu.pdf
    • https://static1.squarespace.com/static/5fc298325e8e827d4298aebe/t/5fc3aaf36457125654abf8a1/1606658805344/bdo_berserker_skill_guide_2018.pdf
    • https://uploads.strikinglycdn.com/files/1192ebb5-cbe7-4e54-9150-e05a1186cca9/xuwatexatupozuru.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d87b.bin
65930c8abd438fcc33a19efbac61bdf9f33caf7ce558f2d78906d4f77c0a1ab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD87B 4916 bytes
font_01_sfnt_off0000e93f.bin
ff7ef9a2fd78185549c757242b059859496f95070969acb87b4eeddc48a74516		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE93F 10488 bytes

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