Malicious PDF — malware analysis report

Static analysis result for SHA-256 149006400c87237d…

MALICIOUS

PDF

50.0 KB Created: 2020-08-15 03:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 276748fddc2b9c6a2fb2ad7a5c282e81 SHA-1: 85834f88d957d0d800f501bf262451380a6daa48 SHA-256: 149006400c87237d29dc25abc6eda997d5712645c17d83d8a5e9ef6e70555242
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a deceptive title and numerous embedded links, including one pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a deliberate attempt to drive traffic to malicious infrastructure. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely to lead the user to a phishing or malware distribution site.

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/wb?keyword=spanish%20to%20english%20common%20words%20pdf
    • http://jusunif.ilovedropmint.com/uploads/1/3/1/6/131636612/8370429.pdf
    • http://files.fichautauqua.com/uploads/1/3/0/7/130775776/484f03f23a.pdf
    • http://files.rockiesshrine.com/uploads/1/3/1/8/131856492/lusitonuniwejononob.pdf
    • http://files.priorityenvironmental.ca/uploads/1/3/2/7/132740415/poturowinu-pepurefeme-zomoxiru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/78090163329.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/26199975133.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/21832232932.pdf
    • https://cdn.shopify.com/s/files/1/0454/4416/9878/files/62041589156.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/acharya_prashant_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/22512801537.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/fibefetodif.pdf
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/jelubuvetub.pdf
    • https://cdn.shopify.com/s/files/1/0439/1731/2168/files/43818224782.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6833/files/85086714603.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/razerogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/nadekul.pdf
    • https://cdn.shopify.com/s/files/1/0439/3458/0891/files/7488062599.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/lipisuno.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d1b.bin
f641ab94bdbc3e52338c0493419c5c0d20b9b2fa1ad5fc23126dc9842ed5bd99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1B 5764 bytes
font_01_sfnt_off00009096.bin
903c358395dff8b535909745ec6187cb5abbc5964cd5f60f0de8ddb2ebc970cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9096 12952 bytes

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