Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d277dc9dda7155…

MALICIOUS

PDF

54.6 KB Created: 2020-07-09 10:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdcb78c1612614edf13caecd5beee771 SHA-1: 084d1fdbe742a1548e5f2d47785348d647acf8f0 SHA-256: 14d277dc9dda7155e1c1cb2770bcc4e97ec11c564279d0bd122eef7ead195a69
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a link farm infrastructure. The primary link redirects to a malicious URL, suggesting an attempt to lead users to potentially harmful content or phishing sites. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=makalah+invertebrata+pdf
    • http://files.madiesfinds.com/uploads/1/3/0/8/130814423/1847847.pdf
    • http://files.bohemiansagegallery.com/uploads/1/3/0/7/130739002/3fc907b3f.pdf
    • http://files.closets-now.com/uploads/1/3/0/7/130776123/08f989b828dd6c7.pdf
    • http://files.texascenterforregionalstudies.net/uploads/1/3/1/8/131856381/29afc.pdf
    • http://files.itshuh.org/uploads/1/3/1/4/131406295/kovuw.pdf
    • http://files.crownukmission.org/uploads/1/3/2/7/132740549/mizaxujon_zarokefi_vefusel.pdf
    • http://files.haleygarrett.com/uploads/1/3/1/0/131070992/2413854.pdf
    • http://files.oasisensembles.org/uploads/1/3/1/4/131438570/sapenakelegazinule.pdf
    • http://files.xlsoftfruit.co.uk/uploads/1/3/1/4/131437636/4286314.pdf
    • http://files.stitchedwithcare.com/uploads/1/3/1/3/131383624/dowumi-wefudazebukop-wivavin-tajewowe.pdf
    • http://files.cosmicbrushes.co.uk/uploads/1/3/0/7/130738806/4660277.pdf
    • http://files.theskinthatburns.com/uploads/1/3/1/1/131164534/f66e7e2f6bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vupovinenese.files.wordpress.com/2020/07/32919244959.pdf
    • https://zubowuko.files.wordpress.com/2020/07/fobozuk.pdf
    • https://vefinuz.files.wordpress.com/2020/07/tadopekenivaduvi.pdf
    • https://vumovegop671400088.files.wordpress.com/2020/06/9474813532.pdf
    • https://puxamalegaga.files.wordpress.com/2020/06/dibegasawosanofitanevu.pdf
    • https://jizogozup.files.wordpress.com/2020/06/2414224855.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45865267400.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78578063821.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bekikelazipilexujewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.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_off00009861.bin
bc1269179fc1e9e0aac85efc8ad9908eb97970efc9a55307e3573f45695a4334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9861 4896 bytes
font_01_sfnt_off0000a8f2.bin
8be6105ce6f4d154385ce09fab0667394e6a4c0cef34abc4c3e3c674f138c7e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F2 10528 bytes

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