Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c554a05e145c41…

MALICIOUS

PDF

49.7 KB Created: 2020-08-20 22:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e86ded496f97f44947535dce1b897f09 SHA-1: 9ac7e57739e3fdd71e4a7a9de6f69b8aa3969a42 SHA-256: 20c554a05e145c41ecede23f26497452119095887a7d598affa5b13b82ebbf68
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, likely as part of a phishing or scam campaign. The document body mentions 'Movies app for ios', suggesting a lure to entice users to click the malicious link. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the final malicious destination.

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=movies++app+for+ios
    • http://files.thewrightauthor.com/uploads/1/3/1/4/131406736/mupidevo-pavig.pdf
    • http://files.yorkguildofbuilding.co.uk/uploads/1/3/1/6/131606550/1784210.pdf
    • http://files.raquelclarke.com/uploads/1/3/1/6/131636682/1672501.pdf
    • http://vamafejuw.canyonwindfineart.com/uploads/1/3/1/4/131453046/kalovu.pdf
    • http://potumubug.maevemccarthy.net/uploads/1/3/1/8/131871729/wojafovig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/somerurunem.pdf
    • https://cdn.shopify.com/s/files/1/0431/9176/3105/files/32000773508.pdf
    • https://cdn.shopify.com/s/files/1/0435/1062/8511/files/72843580338.pdf
    • https://cdn.shopify.com/s/files/1/0429/1048/2591/files/familia_rubiaceae_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/que_es_ayurveda.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/73274988348.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/lapitufidozum.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/zelekugizokipakirewojam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.pdf
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/kilimemelenoju.pdf
    • https://cdn.shopify.com/s/files/1/0438/3863/6192/files/baroque_guitar_plans.pdf
    • https://cdn.shopify.com/s/files/1/0443/8661/5462/files/12897241433.pdf
    • https://cdn.shopify.com/s/files/1/0438/0157/5586/files/rodawagugirewa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007881.bin
9a5f0aa64e8de7b7386a14d5e86a3607fdbf07cc590ed3311786790190db4e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7881 4532 bytes
font_01_sfnt_off000087ff.bin
e87d539adb1885a02c41fdeca53623a1a5001cf1465ebee9e5f1b09d7e6a5d49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FF 10428 bytes
font_02_sfnt_off0000ab94.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB94 4324 bytes

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