Malicious PDF — malware analysis report

Static analysis result for SHA-256 49607de609e31d34…

MALICIOUS

PDF

50.6 KB Created: 2020-08-17 13:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: defc3060243acafc8c0ca7c51786f936 SHA-1: 1b98b01bd640dcfbe705e5b7f8a63c2c54c96824 SHA-256: 49607de609e31d3441dabf478c32724cb6184eca3394310de56332b0a818b098
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, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially corrupted, contains text related to 'Minna no nihongo 1 answer booklet', likely a lure to attract victims. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=minna+no+nihongo+1+answer+booklet
    • http://files.christinaandcanines.com/uploads/1/3/1/3/131384635/denenefizafuxat.pdf
    • http://files.musserbuilders.com/uploads/1/3/1/4/131437987/padasavikuwil-bimizidawafer-zadoxefubel.pdf
    • https://cdn.shopify.com/s/files/1/0451/0013/8661/files/guru_graha_stotram_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/zadasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/75043889615.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7959/files/adulthood_is_a_myth_download.pdf
    • https://cdn.shopify.com/s/files/1/0441/2263/6440/files/temario_administrativo_comunidad_de_madrid.pdf
    • https://cdn.shopify.com/s/files/1/0436/1909/0595/files/alcides_arguedas_libros.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/renewable_and_nonrenewable_resources.pdf
    • https://cdn.shopify.com/s/files/1/0437/6195/9070/files/awk_command_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/angles_of_depression_and_elevation_worksheet.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fca.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCA 6744 bytes
font_01_sfnt_off0000707e.bin
d8ef148c594adba1946aa7d95f188f3f33f69c77bc22762a1a4a57bcfd89a796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707E 2960 bytes
font_02_sfnt_off00007b00.bin
23ea02695ac1d5042dd68fa0aae0a4bded14e33e55fc56b14e96aceab664635f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B00 5088 bytes
font_03_sfnt_off00008c58.bin
32e3c1078c0a7342987c05dbf1a9e9c95c122a01ca79d23c8ee3405dddc6f592		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C58 10052 bytes
font_04_sfnt_off0000aec9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC9 4324 bytes

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