Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0b10ef64758c70…

MALICIOUS

PDF

40.0 KB Created: 2020-08-30 18:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe869416bde4017688e5248794f1c7f9 SHA-1: f9c17f8cd8cd86b75dff3033415e817074a1125c SHA-256: fd0b10ef64758c70f1a22a5d5081bddf42700c7cfd489f1e33fb1aedf285be1f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to redirect the user to a malicious site, likely for further exploitation or phishing. The presence of numerous other links, many hosted on Shopify, indicates a link farm strategy, but the critical IOC is the redirector.

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/wix?keyword=a+raisin+in+the+sun+test+questions
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/55386970875.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/narovoze.pdf
    • https://cdn.shopify.com/s/files/1/0463/2503/9266/files/free_english_worksheets_for_grade_3_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0438/2995/2674/files/picsay_pro_apk_old_version_free.pdf
    • https://cdn.shopify.com/s/files/1/0460/1964/1503/files/diabetes_driving_guidelines_australia.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/fijabufunixabovutagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/92551739871.pdf
    • https://cdn.shopify.com/s/files/1/0437/5481/5640/files/21119296889.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/xavemeranafigatar.pdf
    • https://static.usrfiles.com/ugd/e5a943_0c79f492074d4346943411eecc34b8ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_626a42b00ac241278c55a1596d4feacd.pdf
    • https://static.usrfiles.com/ugd/bfbc46_c5f360c413594465874e8bca87a90c92.pdf
    • https://static.usrfiles.com/ugd/9ec29b_ddafb284ff174ac195b3397f53e1f856.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/section_34_of_arbitration_and_conciliation_act.pdf
    • https://cdn.shopify.com/s/files/1/0434/4601/0022/files/sovojutorimajadoxubinet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/adjective_noun_verb_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/final_fantasy_9_xbox_one_achievement_guide.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_off00005fcf.bin
912f0758bf525200686ff8356adba86197f9fa048c65c4584831151811cefdb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCF 4856 bytes
font_01_sfnt_off00007047.bin
35d13c247343f125c4c64747f18d1ded9cf0d674b3e2f81fdcd40e27619d9531
pdf-font-stream PDF embedded font (sfnt) at offset 0x7047 10244 bytes