Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4598906e6bf7732…

MALICIOUS

PDF

41.4 KB Created: 2020-08-15 16:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 427d7dc39847d7fe735836ee64bd4e5e SHA-1: 2d862a92db5900a2599ec068b79f9f695f790721 SHA-256: b4598906e6bf77328985ddff1d40e2e073d62d382560573cb85227e62d85c50a
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. One such link, https://ttraff.cc/pify?keyword=low+density+foam+sheets, is identified as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure. No scripts were extracted, limiting the analysis of further stages.

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=low+density+foam+sheets
    • http://gusuli.katherineorchard.com/uploads/1/3/1/3/131383483/9c276d599602.pdf
    • http://files.presentationcentre.ie/uploads/1/3/2/8/132814680/15ad9.pdf
    • http://files.thewarblog.com/uploads/1/3/1/4/131452958/2285268.pdf
    • https://cdn.shopify.com/s/files/1/0434/1121/0398/files/87906048562.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7614/files/88464154063.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/android_camera_image_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/bare_necessities_chords.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/acute_pancreatitis_scoring_systems.pdf
    • https://cdn.shopify.com/s/files/1/0437/2617/6407/files/sociological_perspective_essay.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/xifevototedekamagogoduj.pdf
    • https://cdn.shopify.com/s/files/1/0435/1003/8683/files/tantra_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/zanadixinoxilupalutul.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/40922338927.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_off0000639d.bin
0d104d58c28558d36b521c92576ec56c41477c8128d223909947cb25b656372c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 5156 bytes
font_01_sfnt_off00007520.bin
8816a59238e4f6cd4d9e72296fb6b2b0f805c20a1f1158e2d3395a6cd37ff636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7520 10524 bytes

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