Malicious PDF — malware analysis report

Static analysis result for SHA-256 148042de2909c8da…

MALICIOUS

PDF

48.7 KB Created: 2020-08-24 20:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c195359ab60b4c467633e2e69aead7e3 SHA-1: e8510407fdfcc33e916202d453bfc28f65fbf67a SHA-256: 148042de2909c8da38a6591a283981470db075865afe58a1baaa80ddcd3298e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Spectacular Spider-Man episodes' and the authoring application, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the presence of a malicious redirector and a link farm.

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=spectacular+spider+man+episodes
    • http://wotenulug.placercountyreviewagency.com/uploads/1/3/1/6/131636733/jiruxus.pdf
    • http://tuvan.rochellehallconsult.com/uploads/1/3/1/4/131483083/a6823a2389d6081.pdf
    • http://files.skeletonrep.org/uploads/1/3/1/4/131453725/5049610.pdf
    • http://files.mvkey.org/uploads/1/3/0/8/130874110/jaziwa.pdf
    • http://files.ensokitchensomd.com/uploads/1/3/0/8/130874161/5fae6ac001a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6434/4219/files/bunimufijidajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/saboxasegevor.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8080/files/40698038677.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/australian_passport_form_pc8.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/87948294399.pdf
    • https://cdn.shopify.com/s/files/1/0437/8099/7269/files/britannica_concise_encyclopedia.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/anime_shows_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/56878689384.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7407/files/kl_chung_a_course_in_probability_theory.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7350/files/pipuliru.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/definition_of_reliability_and_validity_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/luzibotavovom.pdf
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/22653093690.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_off0000800f.bin
a76f5c4325e2b6f98888ada7a56858f75d70a4b59fc391d316753d2afd0aa6e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800F 5324 bytes
font_01_sfnt_off0000920a.bin
41dc90e128c98f1966431a20491498f1de6f579cb0f8b720a2ced9d17831eb2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x920A 10404 bytes

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