Malicious PDF — malware analysis report

Static analysis result for SHA-256 dffcb1164ef74a4f…

MALICIOUS

PDF

43.7 KB Created: 2020-08-24 18:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2945d7bd6e330e9184bf1a9633a92fce SHA-1: abf38c65932a41ae20244f6c596cca357be0d714 SHA-256: dffcb1164ef74a4fa844e74987e66206be5f161a2f0578b006b2264b5e729723
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=after+effects+animation+composer. This suggests the document is designed to lure users to malicious content through a chain of redirects, likely for phishing or malware distribution.

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=after+effects+animation+composer
    • http://files.stephcolehair.com/uploads/1/3/0/9/130969527/duritabakoluwe_sesap.pdf
    • http://wuvat.aegleio.com/uploads/1/3/1/3/131398020/6536611.pdf
    • http://komaraf.allthingsnoni.com/uploads/1/3/0/8/130874457/c7f2b2c.pdf
    • http://kisaburuz.dulcetdecibels.com/uploads/1/3/0/8/130814004/1576814.pdf
    • http://nogima.baroquecelloproject.com/uploads/1/3/0/7/130738714/xugewedoga-zebukenaviju-pinud-dubowop.pdf
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/taturupojogemiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/wuvigikanoredibeput.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/30310475027.pdf
    • https://cdn.shopify.com/s/files/1/0434/4931/9577/files/baixar_o_alcoro_em_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0432/8770/7804/files/83966451213.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/agenda_imprimible_2018_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7639/files/91253297918.pdf
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/15334959044.pdf
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/13138024157.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/17106149103.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_off00006e39.bin
6d7ba5cca95a39e029497a0877e334c2159b0f49bf54d0bf16604cea27573041
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E39 5116 bytes
font_01_sfnt_off00007f8e.bin
f7b3d17e586cfd1fe68ab77eb577e52b43599b7eb54e01aef9961378d063def9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8E 10132 bytes