Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c7542b1b820394…

MALICIOUS

PDF

42.8 KB Created: 2020-08-21 13:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf53677433f17a3ee8a88858608047a4 SHA-1: d46ac758ef01b5b975c91a6bd33c644a74561e30 SHA-256: 17c7542b1b82039437e1ef102279cc589c171889caf4db6486d5647f6662cb48
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document with high confidence. The presence of many external PDF links suggests an attempt at SEO manipulation or a link farm designed to distribute malicious content. No scripts were extracted, but the overall structure and identified malicious URL point to a phishing or redirection attack.

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.ru/pify?keyword=wakeboard+size+guide
    • http://files.dcscorpus.com/uploads/1/3/2/7/132712447/dibuvatinonogot_kutipubeb_zofixozaf_vavipazowe.pdf
    • http://files.newhopemyanmar.org/uploads/1/3/0/9/130969477/felaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/74596401707.pdf
    • https://cdn.shopify.com/s/files/1/0428/7198/0198/files/73621546359.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/abituriyent_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7612/files/14095444329.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/52494059245.pdf
    • https://cdn.shopify.com/s/files/1/0448/4094/3778/files/cash_book_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/diversity_of_actinomycetes.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/8478468243.pdf
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/kezujalemabupijub.pdf
    • https://cdn.shopify.com/s/files/1/0438/0511/4528/files/rotuzeroseduvuvivukovog.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_off00006b3c.bin
402e57f596486911b4523e9bd36b8cd61a91d9d175eb8561f16649c380597581
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3C 5228 bytes
font_01_sfnt_off00007d26.bin
95ac4a434b8349b823b34342e580b213f3b257ba84cc3ae47217e593e604d3ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D26 9864 bytes