Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a24ea0dab8e0b5e…

MALICIOUS

PDF

39.8 KB Created: 2020-08-26 14:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64b53943cdfe3c942291008eb8da4ab8 SHA-1: 9c225728bb71dce9fbea59e1c83362fc9fead1f6 SHA-256: 6a24ea0dab8e0b5e3c8b34b6afc2fab50051dfc42bb447824336de9f078b93b1
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 Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for content related to 'Always and forever lara jean free on'. The presence of a malicious redirector and a link farm suggests an attempt to drive traffic to malicious infrastructure.

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=always+and+forever+lara+jean+free+on
    • http://mojabuz.landscapegardenerscamberley.co.uk/uploads/1/3/1/4/131483245/lebajojom.pdf
    • http://loraz.wapasbeautysalon.com/uploads/1/3/0/8/130873995/6563747.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/surirabaturiraxanon.pdf
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/tirunidosokunigesegezakuv.pdf
    • https://cdn.shopify.com/s/files/1/0448/0896/2210/files/colors_tv_live_channel.pdf
    • https://cdn.shopify.com/s/files/1/0430/4896/0151/files/17342641612.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/cahier_de_charge_d_un_site_web_dynamique_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0458/0946/7558/files/44753421257.pdf
    • https://cdn.shopify.com/s/files/1/0437/2152/3349/files/jedaxomu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/empire_season_1_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/3019/7925/files/create_new_word_document_based_on_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2690/files/diliwozekaputax.pdf
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/20625173364.pdf
    • https://cdn.shopify.com/s/files/1/0428/6837/5719/files/21508781158.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/aflac_wellness_form_fax_number.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/zijeduseruxo.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_off00005d83.bin
4a811c62ba40e72625d1341536512974ccbe8172f91f544893152a39cf11d315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 5220 bytes
font_01_sfnt_off00006f71.bin
0c63364a6db3e792536669245eeb8b40f330ffca857db4c2fd6f4b39bd792a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F71 10204 bytes

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