Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a32f2792afad074…

MALICIOUS

PDF

34.1 KB Created: 2020-08-11 20:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b1ab394ef6985b1ea91789d381a7bb7 SHA-1: c6f9aa261966d393419b1e4e8a620a81cfff511e SHA-256: 0a32f2792afad0748bf052b84e69b5b2f412280391c6eb7250d9e2ebfa6675dd
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate document downloads, but the primary link redirects to known malicious infrastructure. The document body text and embedded URLs suggest a lure to download a 'catia v5 book pdf', which is likely a pretext for delivering a malicious payload or redirecting to a phishing site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=catia+v5+book+pdf+download
    • http://files.sydneyschmeltz.com/uploads/1/3/0/7/130738940/vobowijid_nufome.pdf
    • http://wevokibo.goucherstudentartshowcase.com/uploads/1/3/1/8/131856158/9f48c5.pdf
    • http://tidal.ojos-sb.com/uploads/1/3/1/6/131606255/meledinujinedi-busovow-galama-bajazajusi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/272951478.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5711/files/9156837294.pdf
    • https://cdn.shopify.com/s/files/1/0446/2444/5603/files/abu_dhabi_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/photosynthesis_gizmo_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/advanced_and_multivariate_statistical_methods_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/useful_russian_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/6545599111.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/megiwagenixipugekas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/bumatodebevisi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8259/files/control_end_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/welipowuxobivunetivukegad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/42355336555.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_off0000484b.bin
52d8d495ea129091bf61691ca67e510fc9ce65a4c4de9aca839376fa57d2dc1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x484B 5144 bytes
font_01_sfnt_off00005a04.bin
0bc1d699f104ecfff948ffcb0455cabcec44ea4f0f7d8910fc66623160f8d2e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A04 9764 bytes

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