Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9388b9f858fa40b…

MALICIOUS

PDF

46.3 KB Created: 2020-08-18 18:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7eef7a57a9af5db76b32bc8ab0ba7ba SHA-1: d486cedab0787caeb1a50070f3962a1c62573063 SHA-256: c9388b9f858fa40be4a6424a5f08f2443bbc55a128d0d9585faa4a12d423675a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or phish users. No scripts were extracted, limiting the analysis of specific execution behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=jsc+result+2018+marksheet+dhaka
    • http://tiguvona.ecoadventuresbarbados.com/uploads/1/3/1/4/131483255/fejuvasowo-wujajobewiw.pdf
    • http://files.natalieteale.com/uploads/1/3/2/6/132695915/sijowuxuvawok-mugox.pdf
    • http://soruzewi.nebraskatraileroutlet.com/uploads/1/3/1/0/131070374/d3642c94d170269.pdf
    • http://files.coastalaquariums.com/uploads/1/3/1/3/131381772/49ac8423af.pdf
    • http://gaxib.ilovesmiley.com/uploads/1/3/0/8/130813420/fituxalupimegazeru.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/lixivufuzibagajifudulanu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/80023845307.pdf
    • https://cdn.shopify.com/s/files/1/0429/2358/9788/files/lamoxebipalenexo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/balance_sheet_vs_income_statement_example.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/78714426657.pdf
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/catalogo_pompe_caprari.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/ethical_issues_in_journalism_and_the_media.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/antioxidant_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/madijelinuvakij.pdf
    • https://cdn.shopify.com/s/files/1/0439/1396/9819/files/windsor_ct_see_click_fix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/53463286681.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/sapibat.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3799/files/signs_and_symptoms_of_skin_cancer.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000751e.bin
06b2d1223df4b293ef6df76414644c7a11793814d8d8170881177b70d115d66c
pdf-font-stream PDF embedded font (sfnt) at offset 0x751E 5752 bytes
font_01_sfnt_off0000888f.bin
0a98b7866814563346a7b90ea3c956ae05e2f5e32bfe06859e5c99e1c3838d8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x888F 10304 bytes