Malicious PDF — malware analysis report

Static analysis result for SHA-256 6290b3932fcf5b48…

MALICIOUS

PDF

41.0 KB Created: 2020-08-19 08:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfb13e29637c5c605fa15a3eb98068a9 SHA-1: 39c662a5f12dd43b711e77dfb80f10bec3610614 SHA-256: 6290b3932fcf5b48e978629f7cd69095565f8e56c710aeec4d0c5e0d17ded1cd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominent URL leading to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a game guide and the malicious URL, suggesting a lure to trick users into clicking. The presence of many Shopify links, some marked as benign and others unknown, indicates an attempt to blend malicious links with seemingly legitimate ones.

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=tutuapp+pokemon+go+ios+guide
    • http://purola.areyouinjax.com/uploads/1/3/1/4/131437254/rorizifaru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/zibixefenowodaripizik.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/8579322075.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/13450465630.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/63165928819.pdf
    • https://cdn.shopify.com/s/files/1/0432/9583/4280/files/fovagunuzomeripuvop.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5209/files/nijikovulamet.pdf
    • https://cdn.shopify.com/s/files/1/0437/1283/9834/files/1024296552.pdf
    • https://cdn.shopify.com/s/files/1/0434/7861/4168/files/after_livro_4_tumblr.pdf
    • https://cdn.shopify.com/s/files/1/0439/7016/6942/files/89475220017.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/add_watermark_to_video.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/add_settings_activity_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0443/0161/5260/files/marine_biogeography.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_off0000634d.bin
a72c0313ace4cd12df7b16f853b6c2fef0e019fb1186132095af5d9f159ebc07
pdf-font-stream PDF embedded font (sfnt) at offset 0x634D 5164 bytes
font_01_sfnt_off000074cd.bin
36240428abd5fb770b0536c2ab5dced83bb897a12e61f89b1ca58d97c9644dc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x74CD 10120 bytes