Malicious PDF — malware analysis report

Static analysis result for SHA-256 f661f0b2651b7518…

MALICIOUS

PDF

49.9 KB Created: 2020-08-24 22:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 806e3aca9f82c98e8c9c5307090886da SHA-1: 2a5e5744053c0c5f920c8eb948046a55ce77c3a5 SHA-256: f661f0b2651b7518820ff16e9ffbcb61972d59264cbdec303752b2b10187f794
120 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 'bookcase plans pdf'. This link, when clicked, leads to the URL https://ttraff.com/pify?keyword=bookcase+plans+pdf, which is flagged as malicious. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirector. No scripts were extracted from this sample.

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=bookcase+plans+pdf
    • http://files.heart2heartfs.org/uploads/1/3/0/7/130775245/toxujozukalezo.pdf
    • http://linupugaz.rhetoricgarden.com/uploads/1/3/2/6/132695832/5861387.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/printable_divider_tabs_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/9309/6600/files/calendario_liga_aguila_2020_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/9780/7265/files/40367125359.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/55701506397.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdf
    • https://cdn.shopify.com/s/files/1/0441/2994/3704/files/41702367608.pdf
    • https://cdn.shopify.com/s/files/1/0431/9245/1235/files/4316306810.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/67742547377.pdf
    • https://cdn.shopify.com/s/files/1/0446/7880/7705/files/jimaxuxabimebozo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/list_of_arabic_nouns.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/18464165385.pdf
    • https://cdn.shopify.com/s/files/1/0433/8561/8583/files/fokabebiwiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/future_simple_exercises_for_beginners.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/
    • https://cdn.shopify.com/s/files/1/0438/9309/6600/files/calend

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082d4.bin
f890f7c31db478f13eb7ee3bc486c456e17ff5c3d5f8f67c71c47c406fb27c03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D4 5168 bytes
font_01_sfnt_off00009474.bin
f47558d67af8051f4ccfa37af9fa45d60d70372d7f3063e6eeca34047c72fa2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9474 10856 bytes

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