Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a592a5705676591…

MALICIOUS

PDF

42.5 KB Created: 2020-08-12 01:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a9bcbe49bf30f6413c4730ad659ef60 SHA-1: cf578b3c3b7bba9e717ad0110c03b477090ffcc4 SHA-256: 6a592a57056765910d20df3e851642d04bd61f452212df3895c07c8127326b3b
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, indicating a phishing or redirection attempt. The document body and embedded links suggest a lure to trick users into visiting malicious infrastructure. The presence of numerous external PDF links further supports the malicious intent, likely for SEO manipulation or to host further malicious content.

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=buku+bahtsul+masail+nu+pdf
    • http://files.christianmendozamusic.com/uploads/1/3/2/7/132741322/3492435.pdf
    • http://files.stonehouse-studio.com/uploads/1/3/2/6/132695194/693804.pdf
    • http://suxunil.midistrictalphas.org/uploads/1/3/1/1/131164079/vivitujafafibep-fejuriru-ruwil-nipuwimefu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/trasplante_de_medula_osea_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/minority_scholarship_verification_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/8556/8923/files/letarajesijarirame.pdf
    • https://cdn.shopify.com/s/files/1/0429/2358/9788/files/wuzorilodepezagazutes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/lawubokorakubunem.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/36832671690.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/49507156289.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/pisavojipolab.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/vaxiliwelagesexivadul.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/pengertian_politik_identitas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/92923818108.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_off000068e3.bin
fdaa7fa58efcc52caf4897f04de5a03e4da6debfcf42982052e08cf225559915
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E3 5440 bytes
font_01_sfnt_off00007b3b.bin
d4355a500f3f79999dd4936d342fc2be8ca7611308c92a9e1ed1a44653b27524
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3B 9992 bytes