Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71d1cb24396a4cc…

MALICIOUS

PDF

47.8 KB Created: 2020-09-03 00:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02a1ff0423d58d2439537f5e7dbe27b2 SHA-1: 57740f8403e466d22609f2bb0f03f00a870c55e4 SHA-256: f71d1cb24396a4ccbd917ca03acecbfe9ad2cbfb67b97c7b150dc2f1ea7ad57e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=chopin+berceuse+pdf'. This URL is presented within the document body, disguised as a search result for 'Chopin berceuse pdf', indicating a social engineering lure. The presence of numerous other links to Shopify PDFs suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted, but the primary attack vector is the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=chopin+berceuse+pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/55263107480.pdf
    • https://cdn.shopify.com/s/files/1/0461/9144/4118/files/bein_sports_tv_guide_usa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1385/5643/files/oxford_discover.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/33622911178.pdf
    • https://cdn.shopify.com/s/files/1/0435/3232/0917/files/bixemejimubitipegovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/87264457763.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/plus_size_black_formal_dress_canada.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/18974907155.pdf
    • https://cdn.shopify.com/s/files/1/0435/6695/6707/files/gifts_three_houses_guide.pdf
    • https://static.usrfiles.com/ugd/17beed_7b39e096658e492c8153a8dc17742e2a.pdf
    • https://static.usrfiles.com/ugd/4d400c_2a6001a4446d44f48f22281de1d66e27.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070a2.bin
54b32135e0b5f30e3889fd2c4cbca3fbda2dfb10a5a4ccd46699980f8702d914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A2 4968 bytes
font_01_sfnt_off00008164.bin
a2c68ada0f19b7eea10df9a048e3117a1a6cf6c75b4dfe46ebdd5c81ad506889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8164 10144 bytes
font_02_sfnt_off0000a41f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA41F 4324 bytes

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