Malicious PDF — malware analysis report

Static analysis result for SHA-256 a18f25e95990c1cd…

MALICIOUS

PDF

88.1 KB Created: 2020-08-12 03:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56c29e4205e33b2291dc831d254afbcb SHA-1: f8d0468c0145f31380164759c332140892d4fd0d SHA-256: a18f25e95990c1cd12ab648ef1cb34bac66e93f7b3f4df3cac49ff18db0bc7f5
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a PDF redirector link pointing to ttraff.ru. Additionally, another critical heuristic detected a PDF link farm with numerous external links, many hosted on cdn.shopify.com. The document body contains the URL 'https://ttraff.ru/pify?keyword=define+ancestral+spirits+pdf', which is likely used to lure users or for SEO manipulation. 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.ru/pify?keyword=define+ancestral+spirits+pdf
    • http://xobifu.bookrackpeoria.com/uploads/1/3/2/6/132695615/9058470.pdf
    • http://files.circuscascadia.org/uploads/1/3/0/7/130775727/e055575018533d.pdf
    • http://files.untoldtales.net/uploads/1/3/0/8/130814246/4091842.pdf
    • http://files.msjkeeler.com/uploads/1/3/1/3/131378993/natonigelajokoxav.pdf
    • http://files.scrantontennisclub.com/uploads/1/3/0/9/130969990/068c08e0f5.pdf
    • https://cdn.shopify.com/s/files/1/0434/1773/1229/files/redirijepubusupem.pdf
    • https://cdn.shopify.com/s/files/1/0437/4301/9159/files/khng_c_c_file_trn_web.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/aflac_hospital_claim_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/gawawaworukelasiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0405/files/17724609347.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0389/files/linear_ak_11_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/3000/files/jidomaluzaxalosisufebux.pdf
    • https://cdn.shopify.com/s/files/1/0431/9513/8208/files/duxadipizivaniwisomidese.pdf
    • https://cdn.shopify.com/s/files/1/0428/4379/9719/files/the_new_vips.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/88738938935.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/sagabaxinepebexofoxokuxin.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/42434341701.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e2.bin
3e78551c66b0794ccad09430e682ebb1c6199dc0b3a70c3025776eaca7a39ae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E2 6912 bytes
font_01_sfnt_off0000fbbb.bin
f2ed185ad198d59241e4a7b10579c4e2c3e50e593f7a51062484b42e3db06c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 5148 bytes
font_02_sfnt_off00010d42.bin
53b16820aeab096c1b5a27474bd8e0f52c6716f83f9922fdf344fae79217cc2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D42 6444 bytes
font_03_sfnt_off00011e4c.bin
59230f39e147ebe85a0ddde168bc29822fc4f3f3f768858decb52457799827bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4C 10692 bytes
font_04_sfnt_off00014244.bin
2b2fa213b92f0499327d02067bd5264c1fc10f11f8e7985f21f9ba1050e22d57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14244 4936 bytes

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