Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9c078090604905…

MALICIOUS

PDF

35.8 KB Created: 2020-08-25 16:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7481258d99c860e628edad87c71781 SHA-1: f41586d4e127e7a211cc1ab8d4a2fc87726fdc51 SHA-256: 4f9c078090604905dad548c211dd2398b9faa28225cba315a55a04217c337eb0
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=video+bts+fire+planetlagu'. The document body also contains this URL and other links, suggesting a lure to potentially malicious content. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=video+bts+fire+planetlagu
    • http://naluz.egeria-services.com/uploads/1/3/2/7/132740278/tojuriderabidarenuge.pdf
    • https://cdn.shopify.com/s/files/1/0457/6683/6388/files/97914955039.pdf
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/ac_market_apk_free_fire.pdf
    • https://cdn.shopify.com/s/files/1/0437/0661/3912/files/77725734299.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5031/files/tedakekovenifani.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8001/files/bolesaw_prus_antek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/critical_thinking_course_outline.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/livunowajinivanuzatutonix.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/44367876373.pdf
    • https://cdn.shopify.com/s/files/1/0440/3508/0342/files/mawonagikipovaxalopavod.pdf
    • https://cdn.shopify.com/s/files/1/0436/0853/9299/files/centrifugal_compressor_overhauling.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000042d9.bin
177b83e7474bf7db22a8ba2b92be03448c761bdae77499feba04fc823c3b5aff
pdf-font-stream PDF embedded font (sfnt) at offset 0x42D9 5196 bytes
font_01_sfnt_off00005487.bin
717cc4b4b72ee95c7a8199c10cb12b0997d2f8d2900623170d4e7e5866a85352
pdf-font-stream PDF embedded font (sfnt) at offset 0x5487 9440 bytes
font_02_sfnt_off000074db.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x74DB 4324 bytes