Malicious PDF — malware analysis report

Static analysis result for SHA-256 34eebb8b7453c4be…

MALICIOUS

PDF

58.8 KB Created: 2020-09-30 06:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4f03c30e23516d395907986db8562338 SHA-1: e4bbc79903bff7f0cb24c33e2daf36390ff1de18 SHA-256: 34eebb8b7453c4bea56b4f31affb3c023ccf8b61f7920c806cba3dc58a7ebf67
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to known malicious redirector infrastructure (ggtraff.ru) and another to an algorithmically generated URL. The document body, though heavily obfuscated, contains embedded URLs that likely serve as lures. The presence of multiple PDF links suggests an attempt to create a link farm for SEO poisoning or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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://ggtraff.ru/strik?keyword=beta+carotene+antioxidant+mechanism+pdf In PDF document text
    • http://files.msmeiningersclass.com/uploads/1/3/1/8/131856127/vifatatolo.pdfIn PDF document text
    • http://files.supernaturalentertamitedproductions.org/uploads/1/3/1/4/131455883/visemomitowezij-fezaweku-xevut-kixivim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7702/3384/files/el_viraje_de_la_filosofia_moritz_sch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1738/7682/files/nivedaxalifateja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8923/4594/files/ap_art_history_sample_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3683/3952/files/python_selenium_xpath.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6961/1930/files/pawuputukezum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/tawisedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8459/5610/files/67012801813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/86000333384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9981/4807/files/acidos_inorganicos_lista.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1538/8840/files/irritable_bowel_syndrome_questionnaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/57668706115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9854/6082/files/ridoderuna.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9901 5480 bytes
SHA-256: 8c6190d5ee9fac1da293c99b2060b9c0d85916665d6463c6f135c95d3217f924
font_01_sfnt_off0000ab84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB84 15688 bytes
SHA-256: 9d2c1b0521c04c12e4531d4e8ff4dfd1a7cba53d50962904800b0599c2730ebc

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