Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ecd0caf57046e0a…

MALICIOUS

PDF

37.0 KB Created: 2020-08-21 11:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4c15f5abe4f9b40c3bf9c8b0f631dd5 SHA-1: 7b70d43b4013dfb6a67ea2e8c6827fed3135ab26 SHA-256: 3ecd0caf57046e0a0467c47d52ba4496a930e25c452683e8e0313b5c21a7404f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link farm and a direct link to a known malicious redirector, https://ttraff.com/pify?keyword=angry+birds+star+wars+1+hack+apk. This suggests the document is designed to lure users into clicking the link, likely leading to further malicious content or downloads. The ML classifier strongly supports the malicious nature of this PDF.

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=angry+birds+star+wars+1+hack+apk
    • http://jitoxama.electnirva.com/uploads/1/3/1/6/131606630/4797391.pdf
    • http://xadoxig.sourceaudio.net/uploads/1/3/2/7/132712407/lalimotajumu_suzakexepebul_luvugifivetote_gebidoxunu.pdf
    • http://nekigene.nashanta.com/uploads/1/3/2/8/132814930/7892988.pdf
    • http://files.primalwisdom.com.au/uploads/1/3/1/6/131606128/54f682.pdf
    • http://files.bgpentertainment.com/uploads/1/3/1/4/131483148/6775993.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/gepozeba.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1341/files/mission_mangal_official_trailer.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/xapeze.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/norozowawu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/korakazugufonesamoposejo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1142/files/65986932070.pdf
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/49804400335.pdf
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/43737040149.pdf
    • https://cdn.shopify.com/s/files/1/0451/0469/3400/files/rutibetiso.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/fowiligopizododunerifitez.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052b4.bin
338ec0d42a63078f698182dd88ff961a60a902f1775aaba14012caea41b4690f
pdf-font-stream PDF embedded font (sfnt) at offset 0x52B4 5740 bytes
font_01_sfnt_off00006649.bin
af1e5a0f9ac51ab1711310902fcecfb077a55a1cde89ffe5fd2ea050d021c148
pdf-font-stream PDF embedded font (sfnt) at offset 0x6649 9568 bytes