Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f79f7c32b64639d…

MALICIOUS

PDF

39.0 KB Created: 2020-08-05 15:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b55fe4c14fd341af866f92456ec8d5d SHA-1: 24eaba25faef6d05381d9a7ab426f92099f98454 SHA-256: 4f79f7c32b64639d2c57db143458b5a3a77489932253469139024ab7cdbe7d16
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a call-to-action button and embedded links, including one pointing to a known malicious redirector. The document body text and heuristics indicate a lure for a 'VCE to PDF converter app download'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=vce+to+pdf+converter+app+download
    • http://files.isis41don.com/uploads/1/3/0/9/130969059/fiwojevapedusazo.pdf
    • http://files.11across.com/uploads/1/3/0/7/130738619/mopupolel.pdf
    • http://files.vintagealleyverona.com/uploads/1/3/1/4/131438240/6837597.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bebupikisanomagidilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/sorikatidifav.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5789/files/67759936507.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6411/files/ctet_2020_notification.pdf
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/jogobuzopobizaranoganadil.pdf
    • https://cdn.shopify.com/s/files/1/0438/6773/4171/files/64342092039.pdf
    • https://cdn.shopify.com/s/files/1/0434/5295/6838/files/59289612117.pdf
    • https://cdn.shopify.com/s/files/1/0434/0200/2584/files/mivisesixoxajewowizuraro.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7266/files/mega_man_street_fighter_x_tekken.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/pisewolezimusewojunozit.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/gasekijafiwixedezo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bf0.bin
308bb5fa444b26e6f9b985f3e0286cec387404c7fd31024b2fc327a843042291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF0 5088 bytes
font_01_sfnt_off00006d6e.bin
b99deef778f2b71522347cba0bf6c7598d1baa512f308970ee64e8735b142e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6E 9964 bytes

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