Malicious PDF — malware analysis report

Static analysis result for SHA-256 456151249a32e801…

MALICIOUS

PDF

39.0 KB Created: 2020-08-10 11:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a050505ae0108463e44e32ac4e423d2 SHA-1: dc2dbff589f31809bfb65501bb0c52cd16ee8dc4 SHA-256: 456151249a32e80133669e7ec3bb36354dc27a3854c5e7dbaa3756b8e5e519f4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body is heavily obfuscated and appears to be junk data, but the presence of the malicious redirector URL and the mass of external links strongly suggests a phishing or malware distribution attempt. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cae+revised+exam+2020+pdf.

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=cae+revised+exam+2020+pdf
    • http://files.shioyacountryclub.com/uploads/1/3/1/6/131606815/jipofamevizi.pdf
    • http://files.egamposol.org/uploads/1/3/1/4/131452887/zulijogotifasi_kuwogutu_lanumuvuxobi.pdf
    • http://files.iyengaryogaojai.com/uploads/1/3/2/6/132695701/33edaecd9c22.pdf
    • http://files.angelahokeauthor.com/uploads/1/3/1/1/131164281/newedu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3081/files/fivutemubena.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/gojuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/this_is_us_s04e14_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0437/3138/6517/files/statistical_inference_estimation.pdf
    • https://cdn.shopify.com/s/files/1/0450/7284/2915/files/barron_s_toeic_7th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/gijibonuwadawugiwimobeza.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/13236605504.pdf
    • https://cdn.shopify.com/s/files/1/0430/6108/4314/files/79564238564.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/23186137135.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/36335001757.pdf
    • https://cdn.shopify.com/s/files/1/0434/6730/9206/files/33210049183.pdf
    • https://cdn.shopify.com/s/files/1/0429/1277/6351/files/62923832288.pdf
    • https://cdn.shopify.com/s/files/1/0454/1009/1176/files/a_brief_history_of_time_new_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/calidad_del_aire_definicion.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/1/0454/1009/1176/files/a_brief_history_of_time_new_edition.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005037.bin
a6c3b8abab4d0185e3e412daad269d22e2a3bc24f726173f897bb05ac41cee85
pdf-font-stream PDF embedded font (sfnt) at offset 0x5037 5464 bytes
font_01_sfnt_off000062bb.bin
48e5ee559f33c956caea91b29a1593a53c1dbf0a374bf7c6b741640192636b6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x62BB 14116 bytes