Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8118b2867b18dee…

MALICIOUS

PDF

33.8 KB Created: 2020-08-19 23:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7e3fd6063d03ead38aa9dcd46bb317a SHA-1: cb24db9862bdafa9a012e6954cc354a0b0714779 SHA-256: e8118b2867b18dee127bea67510043697f0a202acdb0e624793053f787ae3f85
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=banana+boat+sport+performance+spf+30+sds'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a PDF link farm heuristic further supports the malicious intent, as it suggests an attempt to manipulate search engine results or distribute links broadly. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=banana+boat+sport+performance+spf+30+sds
    • http://wifaxaj.shipperverses.net/uploads/1/3/1/4/131454106/wujuwipomo_zulefusir_begujos_zupuwiwamufo.pdf
    • http://sebaradi.carlapasqualini.com/uploads/1/3/1/1/131164394/benajekezituj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8896/9882/files/natedukad.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/41191892358.pdf
    • https://cdn.shopify.com/s/files/1/0437/7640/9751/files/bhagavad_gita_by_prabhupada.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1723/files/43928286988.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/how_to_influence_people.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/87816942339.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/liwusisexomilipixo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/academic_writing_for_graduate_students_third_edition.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_off000044a6.bin
ac6232363cd8936205f6f193610e17976794f834c4662e70a7b620f36b22ec9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x44A6 5764 bytes
font_01_sfnt_off00005823.bin
ddc49446ed3130af9d8f70ccf96b8516fd6d6a2cacea4d7914d40e5c670c54af
pdf-font-stream PDF embedded font (sfnt) at offset 0x5823 10176 bytes