Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c22c3ea4683d036…

MALICIOUS

PDF

53.8 KB Created: 2020-08-07 10:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a88b22b86aadb322474560d7d3d69389 SHA-1: ac7e6d7464073e962c2240b9b79ce196f12727c6 SHA-256: 1c22c3ea4683d036e928c97693780a4190825ba380ed58de0d26440cf6249b84
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Archicad 21 user guide pdf' and the malicious URL, suggesting a lure to download or view a fake document. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=archicad+21+user+guide+pdf
    • http://files.bollesrottweilers.com/uploads/1/3/2/8/132815752/c4b7c1c914.pdf
    • http://files.xnews.blog/uploads/1/3/1/4/131482939/9535730.pdf
    • http://files.nickcharlesmadson.com/uploads/1/3/1/3/131383434/00ff6614b9.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/kimifizaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/fepotaloju.pdf
    • https://cdn.shopify.com/s/files/1/0438/3942/2626/files/best_anime_ost.pdf
    • https://cdn.shopify.com/s/files/1/0437/1048/0533/files/waterikid.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/bookmarking_pages.pdf
    • https://cdn.shopify.com/s/files/1/0432/4179/9843/files/fourth_normal_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0433/1808/3742/files/dukotobabulurexazixojuvu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/st_lucie_county_school_calendar_2016_17.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/29899843509.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/20249468516.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/wasisugarogajifapajigexu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3177/9733/files/54791599989.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_off0000955a.bin
8591a56da08311d5c3057ecd7233a9f236cff1cde147f561233938f259e48300		 pdf-font-stream PDF embedded font (sfnt) at offset 0x955A 5556 bytes
font_01_sfnt_off0000a843.bin
430c44d5db80dff240109fa253f0ae09c41235b34fcd4171b3c47fcd8222a0e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA843 9876 bytes

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