Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf432c6152b171c…

MALICIOUS

PDF

64.1 KB Created: 2020-09-08 07:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32b6dc6db7f8f9e7241e81665e53bea5 SHA-1: 3e079790d1b37d9c58504c7ae2baef9d4849c8b7 SHA-256: 1cf432c6152b171cab53182617f3ce1338f2bd545dc3d32091502bead6ce839d
128 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many of which point to a redirector service. One such link, 'https://ttraff.me/wix?keyword=cesar+chavez+movie+worksheet', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a 'download button' heuristic further supports a social engineering attack aimed at tricking the user into clicking the malicious link.

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.me/wix?keyword=cesar+chavez+movie+worksheet
    • https://static.usrfiles.com/ugd/9bd82e_9f456732d7934966b64be631b9de38d3.pdf
    • https://static.usrfiles.com/ugd/e2a635_7fbde733f0d24e139f33b7383af088a1.pdf
    • https://static.usrfiles.com/ugd/565485_471154754bc941649f5323297b9ad3a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ba776081e1a4b24b12f870d08ffc894.pdf
    • https://static.usrfiles.com/ugd/e3c460_4108dbd01d8e40c49b7c74259636858f.pdf
    • https://static.usrfiles.com/ugd/a86d68_abfaec943c8241eba4faf127e6d31827.pdf
    • https://static.usrfiles.com/ugd/9b33c5_8b270677b11346db97eff5480336bbbc.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_5c7cfe4136854e85b9826c7242fb8ff9.pdf
    • https://static.usrfiles.com/ugd/0aab01_c75e0f5e33094ac4b60651791fc10a25.pdf
    • https://cdn.shopify.com/s/files/1/0437/5835/4584/files/download_aptitude_math_shortcut_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/mutagiput.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/windows_media_center_guide_not_updating_2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/airlift_song_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/flowers_for_algernon_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/i_love_dad_with_the_very_hungry_caterpillar.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/pevesu.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_off0000b0b8.bin
026b959a4cbdedeb8f8adbaf9de852848f69394a497fd7cfa6350ceede84c63b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B8 4976 bytes
font_01_sfnt_off0000c1bd.bin
294de37230f9c0ad5b9b7d4d0659b019704003fdd502e0917c1a4a5f92758e9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BD 10308 bytes
font_02_sfnt_off0000e50f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xE50F 4324 bytes