Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d93cad4ed543254…

MALICIOUS

PDF

50.5 KB Created: 2020-08-01 06:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20c7bc5d9fd8eb37415742b5d7182d17 SHA-1: f476f27652ef5f16f53af6b6dc29c1e12abe3817 SHA-256: 6d93cad4ed543254258d4a84e2f5c1a03f1261258c0ffd12f31c3c0e664072f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to a redirector service and a link farm of other PDFs. The ML classifier strongly indicates maliciousness. The primary malicious URL is a redirector that likely leads to a phishing page or malware download.

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.cc/pify?keyword=voyage+century+online
    • http://files.iproclaimit.com/uploads/1/3/0/8/130874253/mevitifagokulokiw.pdf
    • http://files.rochedesignandtechnology.com/uploads/1/3/1/4/131410479/bugifimusinu-bovemipozum-wikoda-zutudod.pdf
    • http://files.frankonfoot.com/uploads/1/3/1/3/131380126/1dcd3af5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/5237778589.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/zogumukixa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1887/files/11704982880.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2828/files/zirabavaro.pdf
    • https://cdn.shopify.com/s/files/1/0440/2587/2549/files/wavujagakumaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7916/2263/files/7865199561.pdf
    • https://cdn.shopify.com/s/files/1/0435/8543/7853/files/kawimika.pdf
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/xeginofiv.pdf
    • https://cdn.shopify.com/s/files/1/0441/3823/4008/files/fumabatekofuvemop.pdf
    • https://cdn.shopify.com/s/files/1/0431/1669/1612/files/xakopo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/88924605996.pdf
    • https://cdn.shopify.com/s/files/1/0433/7814/7491/files/rumenegezexutijepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sotuxinonuwirumedubisaz.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_off00007928.bin
afd5b04f815d533a30f6725f60548fee55511a614cfaf606a29e1e0fbb481385
pdf-font-stream PDF embedded font (sfnt) at offset 0x7928 4836 bytes
font_01_sfnt_off000089ef.bin
6bbec2a29f8145fe95ffc5468d830b30a1e4e397ad5118565c102f1c35b1aa52
pdf-font-stream PDF embedded font (sfnt) at offset 0x89EF 4856 bytes
font_02_sfnt_off00009a91.bin
84d50d1675eb58d970e950047ef274e9cb2c47e25f4688b39f5c7e0bfac8e17d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A91 9816 bytes