Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a91585405d8141…

MALICIOUS

PDF

46.3 KB Created: 2020-08-26 11:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 822d481dbc3ec6e273c5e828fc526926 SHA-1: fb7cb06a446aa305dcb6553821c495fadb89651d SHA-256: b9a91585405d8141fedeae7aaa6276b39d13e8932aa60a489d738cd020279b2f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.cc/pify?keyword=zulrah+guide+osrs', is designed to lure users by appearing to be a guide for the game Old School RuneScape. The document body, though heavily obfuscated, contains this URL, confirming its intent to redirect users to potentially harmful content.

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=zulrah+guide+osrs
    • http://files.lclfarm.com/uploads/1/3/2/6/132683328/goxosi.pdf
    • http://files.mjshilltopfarm.ca/uploads/1/3/0/9/130969576/3984718.pdf
    • http://files.stbrendansreds.com/uploads/1/3/2/3/132303024/turidibutira_kesanekafasow.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/19720224194.pdf
    • https://cdn.shopify.com/s/files/1/0446/9224/2588/files/iob_atal_pension_yojana_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/7295/4269/files/91464936938.pdf
    • https://cdn.shopify.com/s/files/1/0438/4866/3200/files/43654649673.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/76242372059.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/22975261058.pdf
    • https://cdn.shopify.com/s/files/1/0462/7093/9285/files/87574768377.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/dimijarazenoxedupe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7565/6097/files/bienestar_y_calidad_de_vida_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0435/5240/7704/files/accordare_batteria.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_off000078bf.bin
411005159c99b31fdff8f3d1b3a93f14def31e8aa205be90cd47c6a239bfc3fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 5044 bytes
font_01_sfnt_off000089d6.bin
9dd82eb74caf19b03fcf5a5e1f35a43ab2305ae641aaab55e339e75ec318061c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89D6 10096 bytes

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