Malicious PDF — malware analysis report

Static analysis result for SHA-256 88af8074e76bbc3f…

MALICIOUS

PDF

53.8 KB Created: 2020-08-11 03:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6ea74d5e11b123f47f64563765a84d0 SHA-1: 2e8cafa24de8dcf00ff263a32bd67aae7fc1b422 SHA-256: 88af8074e76bbc3f6da0517803271b79b127a1e06760f9dc13ca061bbbdcf4cd
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, which are likely part of a link farm designed to improve search engine rankings for the lure term 'princess agents novel english pdf free download'. One of the primary links, 'https://ttraff.com/pify?keyword=princess+agents+novel+english+pdf+free+download', is flagged as a malicious redirector. This indicates the PDF's purpose is to direct users to potentially harmful content through a deceptive SEO-based lure.

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=princess+agents+novel+english+pdf+free+download
    • http://dazawoven.lymeaustralia.com/uploads/1/3/0/8/130814328/mivutesatubig_vurelobitopeso_nijezejidulet.pdf
    • http://files.gigibakescakes.com/uploads/1/3/0/7/130775220/zuxenof.pdf
    • http://tinuk.locomotionpettreats.com/uploads/1/3/1/6/131606339/pamatuwubol.pdf
    • http://jebovader.elitegymsamui.com/uploads/1/3/1/6/131637814/450383.pdf
    • http://files.southpawanimalhospital.com/uploads/1/3/2/8/132815054/963091.pdf
    • https://cdn.shopify.com/s/files/1/0437/8099/7269/files/gomixedaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/7753/2824/files/limuroxategeborajaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/zedet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/masikelajugililed.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87960197539.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1317992411.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/tovodakaguvonud.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/nasemezomapolorofomi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0171/files/hotel_brochure_template.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_off0000842f.bin
53279f940c64a63a61b399fa5a5de7fa188fd6299666e51238214258a1336316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x842F 3864 bytes
font_01_sfnt_off00009201.bin
507842578deb9f89d97d45816dfd1de85deab59efe905b0e327713373d9f9b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9201 5572 bytes
font_02_sfnt_off0000a4f2.bin
0702893ca9322a79dcab96aa7daaa4619ca4d0cf8f8a612c75084377cce4f513		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F2 10128 bytes

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