Malicious PDF — malware analysis report

Static analysis result for SHA-256 04692a9d24205eea…

MALICIOUS

PDF

39.7 KB Created: 2020-08-21 08:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 886c54dc61aaec4aa429acca10efd15d SHA-1: f87c888a5ef6760110931801102752901245a7c8 SHA-256: 04692a9d24205eea6f65d76fb5748ba109b031ba2a3fc38be0c0517b41fe451d
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of external PDF links were embedded, likely to manipulate search engine results or direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to a redirector service, which is a common technique for delivering malware or phishing pages.

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=root+para+android+9+apk
    • http://divok.bsajhmi.org/uploads/1/3/2/3/132303219/685796.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/lugulevav.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/10487665611.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/south_america_rivers_map.pdf
    • https://cdn.shopify.com/s/files/1/0461/0624/7332/files/dotizofakezejajizo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7057/8070/files/domuxusepovud.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/34895400774.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/ramosejinutafufozas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/estadistica_descriptiva_conceptos_basicos.pdf
    • https://cdn.shopify.com/s/files/1/0435/9300/7272/files/lowerebejavofiwojojuse.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_off00005fe3.bin
8bc17a7cb3be71bd1518b779328f2de2feffeb328d7b1ed8c4734c61227ec0ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE3 4972 bytes
font_01_sfnt_off000070dd.bin
1be9cea2689a49ca92eb722a5f3af9f6df372939eee182bacbe8ed63437f71fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x70DD 9920 bytes