Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea476ce266e3acd5…

MALICIOUS

PDF

43.9 KB Created: 2020-08-23 06:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd6f4d20972db449deb28ac2023dedf7 SHA-1: 4a780eccb41e7d0b7399a719cd46490772d6dd0f SHA-256: ea476ce266e3acd508b47420c64808b5bc3588f5e82553385720618c7608b111
152 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The primary malicious URL is https://ttraff.cc/pify?keyword=header+footer+template+bootstrap, which likely serves as a lure to download further malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and other external PDF files, suggesting a link farm or redirection strategy.

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=header+footer+template+bootstrap
    • http://romolunig.wicksteadhorseplay.co.uk/uploads/1/3/0/7/130775732/guxepoveberalufusus.pdf
    • http://files.nitinagrawal.com/uploads/1/3/1/4/131406736/225953c.pdf
    • http://files.georgetownnewcomers.com/uploads/1/3/1/4/131483386/dada360c7116.pdf
    • http://files.glasgowsain.com/uploads/1/3/1/4/131406736/logoni-ginetu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3472/0928/files/5_star_hotel_room_amenities_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/0314/0517/files/bibliografia_apa_sexta_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0437/1929/5130/files/99023877044.pdf
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/41559526379.pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/tokovi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/gujikela.pdf
    • https://cdn.shopify.com/s/files/1/0433/7670/5692/files/35995377220.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/syllable_structure_examples.pdf
    • https://cdn.shopify.com/s/files/1/0450/3525/8020/files/azhar_video_song_bestwap.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/58925154971.pdf
    • https://cdn.shopify.com/s/files/1/0440/1122/5246/files/12082822271.pdf
    • https://cdn.shopify.com/s/files/1/0437/9436/6626/files/deck_the_halls_music_sheet.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_off00006e7e.bin
a09f05ff32e62c8b9a09f25b4c9e3568b3743963d5abd05b77807980092eac10
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7E 5288 bytes
font_01_sfnt_off00008053.bin
17037efd194ef1b35b58ca65f45b704ef2e71161f08806e13f186f87439b03ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x8053 9972 bytes