Malicious PDF — malware analysis report

Static analysis result for SHA-256 092583fcdef581d0…

MALICIOUS

PDF

34.5 KB Created: 2020-08-22 01:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c17e0807986064291774ee40d89599ab SHA-1: b7f1aeef062a669fe4e25d5b0d98ab22c89bb055 SHA-256: 092583fcdef581d0b65d9f5039a83ce494b03e9ca052c86f608c2d1e9d32bd49
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. One of the primary links directs to a known malicious redirector, indicating a malicious intent to lead the user to harmful infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=rgb+led+common+anode+datasheet
    • http://files.shoptempus.com/uploads/1/3/0/7/130740092/4431790.pdf
    • http://files.theartdept.org/uploads/1/3/1/6/131606146/78fbe1798d70.pdf
    • http://rixobi.nubeginningfarm.com/uploads/1/3/1/1/131164250/ruzuxidepawexu_pafefi_zulupevazanato_vesesij.pdf
    • http://files.fioga.org/uploads/1/3/1/6/131606617/tegedubu_nasasanepomub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/anticresis_en_el_peru.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/misabedifane.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/blue_abstract_background_vector_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/webafelevolosametuxobaza.pdf
    • https://cdn.shopify.com/s/files/1/0435/0024/1061/files/63375640658.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/sopurijiwebororelesawub.pdf
    • https://cdn.shopify.com/s/files/1/0433/3489/3721/files/blackberry_passport_android_install.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1716/files/chicago_manual_of_style_quick_reference_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/20062870618.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58933331969.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_off00004909.bin
1fb7db2cad1a44b8c0716c406d518b0802cf091a188709f7ee38de1f286d408f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4909 5404 bytes
font_01_sfnt_off00005b3c.bin
f22c89c3d54bc41c98a693648e0adf6dbff31209196718a61e3aab98568fd29c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3C 9944 bytes