Malicious PDF — malware analysis report

Static analysis result for SHA-256 13478a8375f334c5…

MALICIOUS

PDF

54.2 KB Created: 2020-08-10 03:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c8521d60f812d62c6d65de9c97620a4 SHA-1: 2cf77b445b82882bca268e7f194ddfecf0b7b4b2 SHA-256: 13478a8375f334c510c940fb4c63688ca3d9cf3bb8f7c3b95b3fcd055f1cb564
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to medical terms and a URL that mirrors the malicious redirector. This suggests a phishing or scam attempt where the user is tricked into clicking the link, leading to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=analgesik+antipiretik+antiinflamasi+pdf
    • http://files.sorellacalisthenics.com/uploads/1/3/0/7/130775370/wisanam_zuxoj_vimim_nexetizafan.pdf
    • http://files.disinfectionsprayer.ca/uploads/1/3/1/3/131380397/xawatenojiguxawa.pdf
    • http://files.patriciagodden.com/uploads/1/3/1/4/131483019/5adf2.pdf
    • http://files.cvillematerials.com/uploads/1/3/1/4/131437669/8efc3ea30714.pdf
    • http://files.onelittlelight.org/uploads/1/3/0/7/130775025/lupupo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/zopududaju.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/campbell_biology_in_focus_1st_edition_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/jovenetipegasiloxupuxewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/mubimukopipavejaxixerinif.pdf
    • https://cdn.shopify.com/s/files/1/0440/1309/3029/files/metabolic_syndrome_review.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/48336206438.pdf
    • https://cdn.shopify.com/s/files/1/0433/3921/9099/files/44535917306.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/19760171867.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32852202686.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/tagogefuzoziderejivoxoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/6904/5926/files/proyecto_de_investigacion_tesis.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_off0000960b.bin
3445e43f9fd24afe5d05bbf887a9c31d1a20f90efc1cf4aa615704535d24a79c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x960B 5416 bytes
font_01_sfnt_off0000a862.bin
0939f3bdedf8f1400400f0046b72d673f690421f3d8fc729d5b714ee5af8dcfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA862 10240 bytes

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