Malicious PDF — malware analysis report

Static analysis result for SHA-256 686d2c2d900ba2c5…

MALICIOUS

PDF

59.9 KB Created: 2020-08-17 17:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e40147451dd72ac4ecdddcceeaa97e4 SHA-1: 6b366e4dfd6eaace75cbb2c75bbfbef634e445e3 SHA-256: 686d2c2d900ba2c536dc3891edd85d030c661939bcc4c48879190aaab941d8b3
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious redirectors, indicating a link farm or phishing attempt. The primary malicious URL identified is https://ttraff.com/pify?keyword=lagu+bury+a+friend+lyrics. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lure users to malicious content, aligning with spearphishing tactics.

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=lagu+bury+a+friend+lyrics
    • http://gapitij.thechannelislandgirl.com/uploads/1/3/0/7/130776078/c2ead4fe1e.pdf
    • http://files.declutteringspaces.com/uploads/1/3/0/7/130776218/duxupugixa_mewan_zesasuk_vikizama.pdf
    • http://files.national-energy.us/uploads/1/3/1/1/131163832/zisukasu-sitebakuluxavu-xifikesilebazod-jobijekepun.pdf
    • http://sedoser.sdlandsurveyor.com/uploads/1/3/1/3/131380351/1794913.pdf
    • http://deful.halcyontv.com/uploads/1/3/1/3/131383434/5165215.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/rozisatevazunikinirazaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0440/6679/9766/files/67125972862.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/wefekofeba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/band_aid_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/dokalewut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0439/2629/0587/files/hitchhiker_s_guide_to_the_galaxy_film.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3013/files/zeros_of_polynomial_functions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/4333/8912/files/38672194071.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/punufidijojikara.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_off0000ad50.bin
159ee298b3379e577491f64b3a308eea8b8579c960f1b4632380d06ef6499da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD50 5372 bytes
font_01_sfnt_off0000bfa9.bin
b9a1cce6aefd6b5fd4ed8e458e3f22d9640d42710ec26d120f303679d3e2de46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA9 10176 bytes

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