Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b32b780ac841c55…

MALICIOUS

PDF

40.3 KB Created: 2020-08-15 06:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a72c17579bd3bb4569b0e7094917bd18 SHA-1: 151d49f9e31274ebfeff19245131fc913db9c0fd SHA-256: 6b32b780ac841c5576a835c0d6bcfd721c9724223d3c1f7d9a26cbc518a7755b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The ML classifier strongly indicated maliciousness. The primary malicious URL identified is ttraff.com, which is flagged as a redirector.

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=ground+sheet+for+intex+pool
    • http://watuj.orchardviewlincolns.com/uploads/1/3/1/4/131455734/vupirijixemubew-basujazot-sunadurolos-nulesagodariv.pdf
    • http://files.twistedvixencosmetics.com/uploads/1/3/0/9/130969545/0348a97ea.pdf
    • http://xifebusu.i-a-m.tk/uploads/1/3/1/4/131437812/8182344.pdf
    • http://files.seekingthepast.com/uploads/1/3/0/7/130775076/5639586.pdf
    • http://files.anniepfluegerphotography.com/uploads/1/3/1/0/131071295/buneteviz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0200/3619/files/kokorax.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/mechanisms_of_cardiac_arrhythmias.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/after_livro_1_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/que_es_un_cateter_venoso_central.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/gubazosipatumedewaga.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4586/files/66112679973.pdf
    • https://cdn.shopify.com/s/files/1/0449/7804/5086/files/sukofoxegawesuzejulufeba.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6294/files/nonilabeverazat.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/neoplasia_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/additive_manufacturing_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/53584159062.pdf
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/13116786750.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_off000060ac.bin
f9e4e07fad3557545758600321daba2b427c41c8eb60d13e2cfce373be33f973
pdf-font-stream PDF embedded font (sfnt) at offset 0x60AC 5020 bytes
font_01_sfnt_off000071bf.bin
13fc7c3ae2b56dc71dfcc550f1d14b3b896a47e9de8a62abcf4a6de9ee756efd
pdf-font-stream PDF embedded font (sfnt) at offset 0x71BF 10112 bytes