Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfb2ee8e827fa1e…

MALICIOUS

PDF

47.8 KB Created: 2020-09-12 03:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55be4588910d16bacb6d1de3ff08f992 SHA-1: 78bc34c1d3a362d23860c0931f3caef72004eb13 SHA-256: 2cfb2ee8e827fa1e938f171e2e44531f64279b326871b5d6b450e4927476574b
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=brandon+grotesque+text+font+free'. This link is presented within the document body, alongside numerous other links to PDF files hosted on Shopify, likely as part of an SEO spam or link farm tactic. The presence of a 'download button' heuristic further suggests a lure to trick users into clicking the malicious link. The primary intent appears to be redirecting users to a malicious site, potentially for phishing or malware distribution.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=brandon+grotesque+text+font+free
    • https://cdn.shopify.com/s/files/1/0434/5276/0224/files/bearing_failure_analysis_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/paramore_my_hero.pdf
    • https://cdn.shopify.com/s/files/1/0429/1562/7175/files/gatogepamazeladujilan.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/abdul_kalam_essay_in_english.pdf
    • https://static.usrfiles.com/ugd/3e5db3_1c1836f02a834b5b9cb46a1d0a14df91.pdf
    • https://static.usrfiles.com/ugd/fa32a6_910a63bebf0449308560af98eb2f45ee.pdf
    • https://static.usrfiles.com/ugd/37428b_47546a1c11534aa09eef959897b38e7b.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6432/files/6th_grade_math_review_test.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3816/files/babavumite.pdf
    • https://cdn.shopify.com/s/files/1/0429/1539/7788/files/wesimobototuxutojubutute.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/cards_against_humanity_game_of_thrones.pdf
    • https://cdn.shopify.com/s/files/1/0439/9969/0910/files/tebilifana.pdf
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/1248310706.pdf
    • https://cdn.shopify.com/s/files/1/0438/3778/4229/files/tonight_west_side_story_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/ssc_math_books_free.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
stream_005_off000092f5.bin
2fa841f91eb0709fe409fe2f5945de561b0970faf6deeb65175dd16d8e9567c3
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x92F5 19324 bytes
font_00_sfnt_off00005e35.bin
811c238e309a50676b5d34596e32b2778367d4daedf64e01fda52eca69c805e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E35 5288 bytes
font_01_sfnt_off0000703f.bin
f850953db74a882893abc349ccc9e78da8d3417954d7a1348bb3536c333b32cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x703F 10060 bytes