Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b08d9fbfe628cf4…

MALICIOUS

PDF

35.9 KB Created: 2020-08-17 09:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8ede5209c97a8e77cd10d29ddbe3037 SHA-1: 302c883357b5aa13695aebc94363d59ae397d071 SHA-256: 6b08d9fbfe628cf4711bef0d6d6c5384839e107d990a09af13abf5598296e4bf
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Fisheye lens camera new apk'. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly indicated maliciousness.

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.ru/pify?keyword=fisheye+lens+camera+new+apk
    • http://zazowixax.dealshakerphilippines.com/uploads/1/3/0/7/130739811/49de68.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/3366/3400/files/jazz_styles_mark_gridley.pdf
    • https://cdn.shopify.com/s/files/1/0436/5818/2809/files/handbook_on_business_process_management_2_pdf_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/govejusudopazokalizogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/84597556474.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/no_support_for_locale_en_us_utf8.pdf
    • https://cdn.shopify.com/s/files/1/0440/8187/3048/files/what_is_aspects_of_human_growth_and_development.pdf
    • https://cdn.shopify.com/s/files/1/0439/1672/2344/files/voderipekirenir.pdf
    • https://cdn.shopify.com/s/files/1/0434/8107/1782/files/bodevefopamixore.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/93025989549.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/kegivo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004286.bin
655b48ef0ad13df3467b60643b17dc4d4150a5ab5cd38418c048c3e09f85359f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4286 5384 bytes
font_01_sfnt_off000054ae.bin
a0eef1cbbc2b823ba45af36bb392318c998ae93944baed58d494073728d4edca
pdf-font-stream PDF embedded font (sfnt) at offset 0x54AE 2188 bytes
font_02_sfnt_off00005eca.bin
f32682136a2fc980cedf624d2d1b8b415d584baffc373392b70da885447a4ec6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECA 11384 bytes