Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cde049f5bafc0a3…

MALICIOUS

PDF

44.8 KB Created: 2020-08-19 06:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30c7245153db6c796ee39ddd0391f293 SHA-1: 7eb0be7041fdc17922ae4ea3582744ce97ee621d SHA-256: 8cde049f5bafc0a3def7991a9e1df0938915f93fbc1603fa9d6d76faedb4d8b2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though partially corrupted, contains text related to 'Chrome web store internet manager' and references to wkhtmltopdf, suggesting a lure to a potentially malicious download or phishing site. The heuristic PDF_SEO_LINK_FARM indicates a mass of external PDF links, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.ru/pify?keyword=chrome+web+store+internet++manager
    • http://files.devotedtotheking.org/uploads/1/3/0/7/130776277/4916315.pdf
    • http://files.plumtreecreative.com/uploads/1/3/2/7/132740892/cd8e00.pdf
    • http://files.dovemountaincloggers.org/uploads/1/3/2/7/132740804/tejufalasipej.pdf
    • http://files.biophysical-ecology.com/uploads/1/3/1/4/131406356/xivut_girusidusowele_finusagon.pdf
    • http://files.bradlycurriemsf.com/uploads/1/3/0/8/130813885/netora_fipewotobawu_dewimos.pdf
    • https://cdn.shopify.com/s/files/1/0431/2458/8701/files/lisivigekekopifobefupeji.pdf
    • https://cdn.shopify.com/s/files/1/0440/8881/9864/files/social_anxiety_disorder_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0436/8619/9461/files/elan_secret_garden_violin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/99725562877.pdf
    • https://cdn.shopify.com/s/files/1/0435/7128/2079/files/cahier_des_charges_caf_tunisie.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/corporate_law_reporter_companies_act_2013.pdf
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/tenurar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3671/files/ccda_official_exam_certification_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/12402675317.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/anita_moorjani_book_dying_to_be_me.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/microsoft_access_database_engine_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/xasuvoxijugigejomi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/ripunezuwonuwi.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/
    • https://cdn.shopify.com/s/files/1/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f9.bin
1abc9f4ecb832e29e40b8d536413e834049acaec4374edad5a6f32b2905390e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F9 5112 bytes
font_01_sfnt_off00007542.bin
fe95dd0766bdb0d20a14cca278f045f9f28c48da2b483f0f3616ef9fe0676227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7542 10068 bytes
font_02_sfnt_off000097aa.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97AA 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.