Malicious PDF — malware analysis report

Static analysis result for SHA-256 85676685c4167505…

MALICIOUS

PDF

47.0 KB Created: 2020-08-02 10:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8be86bc6e9583e10378947a77b9b3d14 SHA-1: 011118386ee3063b081aeafdfab253fb9402a22c SHA-256: 85676685c416750583840e5c475e71c0ee99f78cedeadc2520689ad058b58c5f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=kaplan+step+2, is identified as a malicious redirector. This suggests the document is part of a link farm designed to lure users to malicious sites, likely for phishing or malware delivery.

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=kaplan+step+2
    • http://files.jacobveritas.com/uploads/1/3/2/6/132683334/bdf7ced5ec6f79.pdf
    • http://files.turkishinstructor.com/uploads/1/3/1/4/131453943/kofutewabafisega.pdf
    • http://files.lmmsorchestra.com/uploads/1/3/2/7/132740337/d989b74c8c.pdf
    • http://files.yourownfm.com/uploads/1/3/2/8/132815753/xexuko-wibejivolef-fujuminigukof.pdf
    • http://files.argumentationtoolkit.org/uploads/1/3/1/6/131606128/famofogujositov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/29720164923.pdf
    • https://cdn.shopify.com/s/files/1/0435/5329/2440/files/lopigevonowomefeteluxepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/61416547110.pdf
    • https://cdn.shopify.com/s/files/1/0434/6167/3126/files/zusipaviju.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/jajudese.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9715790575.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/betesetugoveximubifibodod.pdf
    • https://cdn.shopify.com/s/files/1/0439/0407/3880/files/noxegonat.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/76129982817.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/rewugovikonijuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/rivozejisekomofad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11411440246.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/63999763326.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6677/files/nofovitozekiwazoxaweraz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/14746622912.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c32.bin
6feeec77e49cbe1ac67cec48705e954a4e51cec0067d2b41edc539c5cbacb2ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C32 4448 bytes
font_01_sfnt_off00007b53.bin
33a7f2654574a40ecf1b072fe914a82063e746e640c16272456d9bb7e4bf3295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B53 10904 bytes
font_02_sfnt_off0000a059.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA059 4324 bytes

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