Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f02c1bc2b2e694…

MALICIOUS

PDF

40.6 KB Created: 2020-08-06 00:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27e3a78c83bc69d09f23fa2a79b1ea1d SHA-1: 308908c10fa72d47b033c1c6b306b16a656aefe2 SHA-256: 65f02c1bc2b2e6943ae5bbfdc7c500976148fa1c00a2ba2e03cb721c6357b636
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL which is likely intended to trick the user into downloading further malicious content. 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.com/pify?keyword=orthodox+church+calendar+2020+pdf
    • http://files.smokeheadguitars.co.uk/uploads/1/3/1/8/131871593/8108800.pdf
    • http://zitogesa.settimocieloretreat.com/uploads/1/3/1/4/131483371/4296487.pdf
    • http://files.theroute92.com/uploads/1/3/0/8/130873973/zuguxizamuri.pdf
    • http://files.lindamitchellbooks.com/uploads/1/3/0/7/130776120/95883.pdf
    • http://files.marshadimes.com/uploads/1/3/1/0/131070689/64cb7d8b335.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/6075391947.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/sugime.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/10568302156.pdf
    • https://cdn.shopify.com/s/files/1/0439/5371/7406/files/5470303693.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/difogitovomafenepukotoko.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/jirupaje.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/xobufunepavumizo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/92145926781.pdf
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/22410986546.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/36555258055.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/sobizijir.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/wagikuwinifig.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_off00005fba.bin
bf90b5f4a34e6f0cc2c6e546205188d8a8e7c905a6cc28a766c6058410f7a074
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBA 5432 bytes
font_01_sfnt_off00007231.bin
4c8928fc44a77220f2b62bd45a25fd15613f97dfffa8bdadd72070dabae7b7a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7231 10364 bytes