Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca829302e835c58…

MALICIOUS

PDF

64.2 KB Created: 2020-08-26 21:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d748b6aa9ffbf29178a7236da8848e SHA-1: 3bc0b144d7e7ed374c5e9f22453695ed5a0b635b SHA-256: 5ca829302e835c582fbd00d3ae6653df9dd32a2098ea1c932930cb1eea55cf27
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised with text related to a 'sabbath school lesson study guide'. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm used for SEO poisoning or distributing further malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=sabbath+school+lesson+study+guide+te
    • http://gisivas.lowercreekcreations.com/uploads/1/3/0/8/130813604/zuseziro_kesasewokij_kowizipugijen.pdf
    • http://files.xanderkarkruff.com/uploads/1/3/1/0/131070112/vowejopit.pdf
    • http://lagobos.rurroz.com/uploads/1/3/1/4/131437375/9454467.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/5132/6371/files/xasulofixezevotidula.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/42386231800.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7295/files/gifudoduzorowakiguvazupo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6926/6325/files/v20_rites_of_the_blood.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/28119236588.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/54409232160.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/25796896229.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/madilem.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/digitojakitemomironut.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9960/files/cours_algorithme_exercice_et_solution.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_off0000b003.bin
a09c09b327c432ee3f9f7c5a1edc21536627f75b93569059c17c78d4dce4d249		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB003 5332 bytes
font_01_sfnt_off0000c217.bin
52b04bbba44568ccf7a86a70302592257b1feeda0d475cfc590e5c6dd4f15404		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC217 10408 bytes
font_02_sfnt_off0000e582.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE582 4324 bytes

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