Malicious PDF — malware analysis report

Static analysis result for SHA-256 768d88ae52ee30f5…

MALICIOUS

PDF

34.1 KB Created: 2020-08-06 17:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0254ebb26cbfdafef25e408992d453c SHA-1: a0c1b4d94ac951dad8ebfacb1ef8116e261e42c8 SHA-256: 768d88ae52ee30f56da343163059c3f36f628f7a8b432f32998bd99ef319f551
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate the PDF is designed to link to external content, likely for malicious purposes such as phishing or malware distribution. The embedded URLs suggest an attempt to lure users to malicious sites, potentially leading to further compromise.

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/wb?keyword=reglamento%20interno%20de%20la%20asamblea%20legislativa%20pdf
    • http://files.comalcommunityband.net/uploads/1/3/2/6/132696104/3250d2b4219c7.pdf
    • http://files.cantonfitnesscenter.com/uploads/1/3/0/9/130969790/8814742.pdf
    • http://files.greenstonedesign.co.uk/uploads/1/3/0/7/130738841/9677808.pdf
    • http://files.formygems.org/uploads/1/3/1/1/131163599/7245.pdf
    • http://files.deparel.eu/uploads/1/3/1/4/131437984/c228d956e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5500/3286/files/jawivarikizara.pdf
    • https://cdn.shopify.com/s/files/1/0436/0873/5907/files/regrouper_plusieurs_mac.pdf
    • https://cdn.shopify.com/s/files/1/0438/5888/6806/files/53181747449.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/kozilojawenoxamoju.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/xulabamemefenixavolij.pdf
    • https://cdn.shopify.com/s/files/1/0432/9052/5849/files/vopulirefolovigukuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/riguvekirutosemixut.pdf
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/battleship_full_movie_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/believing_is_seeing_creating_the_culture_of_art_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/39676693702.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9686/files/plural_form_of_radius.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/xebabes.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_off0000464d.bin
b6a74ac4d0165a0322df371e8b7880a669afc2901521dae4b659252d98b40aab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x464D 5568 bytes
font_01_sfnt_off00005930.bin
4abbc054157908484e3d72cee6a799b714c024d3777b191a497364c99d6161bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5930 9808 bytes

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