Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98c225bcace69ec…

MALICIOUS

PDF

68.5 KB Created: 2020-11-18 04:25:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 098d62ccda341c38f178be37d5ab1a1d SHA-1: e840157b10b0ee0beffe0915e4109fe325d782a8 SHA-256: b98c225bcace69ec7b66afb8a7e8b9457617a5d2733c26cb673c9f3fd813440d
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The embedded URL `https://ggtraff.ru/123?utm_term=southwest+airlines+flight+attendant+jobs+atlanta` is a primary indicator of this malicious activity. The document body, though heavily obfuscated, contains text related to job searching, suggesting a social engineering lure. The PDF also contains a link farm, further supporting a malicious intent to redirect users to potentially harmful sites.

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.
  • 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://ggtraff.ru/123?utm_term=southwest+airlines+flight+attendant+jobs+atlanta
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/95dc3.pdf
    • https://cdn-cms.f-static.net/uploads/4454432/normal_5fafe4ba8f018.pdf
    • https://cdn-cms.f-static.net/uploads/4449783/normal_5fb43b6f69e9b.pdf
    • https://cdn-cms.f-static.net/uploads/4374968/normal_5f9e69525f1d5.pdf
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/koxigizaxo_fopuxap.pdf
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f8dc2d26a45c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vufupu/oracle_database_11g_administration_workshop_1_student_guide.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/rewubarepijatidopuraj.pdf
    • https://s3.amazonaws.com/tetenifeme/79787047094.pdf
    • https://s3.amazonaws.com/purawuma/catalogo_berrendo_2018.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/uglies_book_free.pdf
    • https://s3.amazonaws.com/welanisowari/ca_state_disability_continued_claim_form.pdf
    • https://s3.amazonaws.com/jamokaroxoj/mavifelamebejit.pdf
    • https://uploads.strikinglycdn.com/files/cb3e55c3-b7c4-4910-9dd2-28bba8d88728/60257371793.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_off0000ce31.bin
e9637ef192722c68b8f9d8ddfe0b4d370013f9cf5ecf02c13f11304ddbe976d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE31 5580 bytes
font_01_sfnt_off0000e134.bin
1a21cec930667c44b99c783fff40d833a06569ad2b57ad82642445f02a63b684
pdf-font-stream PDF embedded font (sfnt) at offset 0xE134 10548 bytes