Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fb9a46bb2a51df…

MALICIOUS

PDF

33.2 KB Created: 2020-08-17 07:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d95dcf707108bc2bd0cd6144d260930 SHA-1: 2b36ccd6bfedc74639eb510d1ae662b994874ec2 SHA-256: 48fb9a46bb2a51dfb1c2c14fb573f52e896164b5e8543533b7c7376cb2dba755
128 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a download for 'Alliance laundry systems dryer manuals'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and PDF_SEO_LINK_FARM indicates a large number of external PDF links, likely for SEO manipulation or to host further malicious content. The SE_DOWNLOAD_BUTTON heuristic suggests a lure was present. The primary IOC is the malicious redirector URL, which is likely used to deliver a secondary payload.

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.com/pify?keyword=alliance+laundry+systems+dryer+manuals
    • http://files.14thstreetartistcommunity.com/uploads/1/3/2/6/132695602/jiful_kavomapubuvop.pdf
    • http://files.essenceofbeautydublin.com/uploads/1/3/1/6/131637057/9362341.pdf
    • http://pokol.yogibjewelry.com/uploads/1/3/1/4/131409090/216ab92b.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/meredugumitor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/pathology_a_color_atlas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/55787283467.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3703/files/46412061624.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/analog_photography_book.pdf
    • https://cdn.shopify.com/s/files/1/0455/3677/2261/files/63375086722.pdf
    • https://cdn.shopify.com/s/files/1/0433/3898/9718/files/piano_arpeggios_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/89213637822.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_off0000477f.bin
464e157e82f7c1678e5d42b63aa0ec8d4bb9b7c7781e0f526e31be3579cd8081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x477F 5176 bytes
font_01_sfnt_off000058fb.bin
e9ddf686dc7c2d9ae45834ef1934d7f29762234f35f2f9ffdbb8d263b2b6cc7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58FB 9204 bytes

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