Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc24a12b2d5eb58…

MALICIOUS

PDF

37.4 KB Created: 2020-08-04 12:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65e79b1edc0a2c1ff8f122963821b290 SHA-1: 9dfaf745c751d7e437c60a272b1ddb2eaf21b12b SHA-256: ebc24a12b2d5eb58d99b072e86a3715e92b3fc1cf28b254c1773dc230ee9ffbb
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=culinary+tourism+lucy+long+pdf', is designed to redirect users to potentially harmful content. The document also contains a large number of embedded links, many pointing to Shopify domains, but one specific URL is flagged as a malicious redirector. The overall pattern suggests a phishing attempt using a lure related to IRS forms to entice clicks on the malicious link.

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=culinary+tourism+lucy+long+pdf
    • http://mexox.randytoroni.com/uploads/1/3/0/9/130969061/zatowiputo.pdf
    • http://files.cofchristgainesville.org/uploads/1/3/0/8/130814346/1736816.pdf
    • http://files.scottcardmusic.com/uploads/1/3/0/8/130874240/viribavobigeput_kixegumibudupev_fimurabukura.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/irs_form_2553_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/43736981564.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4182/files/82149050683.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/lowes_trussville_al.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/bixitimenuresaragaku.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/wusinopagagiwepobiwane.pdf
    • https://cdn.shopify.com/s/files/1/0431/1030/1847/files/underline_text_discord.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/6614167855.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7959/files/vukor.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6985/files/66772602070.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4675/files/animal_farm_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/98550070328.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_off000054a4.bin
bec4083592b457e51608024e3c0f7a7f7b877e6bbdb22ec90bf2a290fb06a2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A4 5484 bytes
font_01_sfnt_off0000673d.bin
9181aeb55b65130dfc7db129bf04a75012a374f19018e1d2188b4a728794f4db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673D 9808 bytes

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