Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad811d5f9e3e56b5…

MALICIOUS

PDF

45.8 KB Created: 2020-08-10 00:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 686f5ff06bb4e8f7f6c722cbfbfb5def SHA-1: fd8a7ba2bc4578d903c7432e64e74c5a8a194fd7 SHA-256: ad811d5f9e3e56b5229a4691927a57c74ebb2e8ae3048376869059942674df42
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to PDF manipulation and includes the malicious URL. This suggests a social engineering attempt to trick the user into clicking the link, likely leading to malware download or a phishing page.

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.cc/pify?keyword=reduce+pdf+dpi+mac
    • http://fetan.nataliebritecoaching.com/uploads/1/3/1/3/131383657/0eff211a9d99786.pdf
    • http://files.pediatricspeechthpy.com/uploads/1/3/1/1/131163718/jovogavemusezowilune.pdf
    • http://files.twopsinapodohio.com/uploads/1/3/1/0/131070993/wikiparuzomareg.pdf
    • http://files.hidayatashila.com/uploads/1/3/1/3/131379085/4780627.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0405/files/natewelujipokopulinin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/ipad_air_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/punctuation_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/pdf_split_and_merge_software_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/34200564089.pdf
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/relieving_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/13889428730.pdf
    • https://cdn.shopify.com/s/files/1/0451/1825/9365/files/enter_the_gungeon_megahand.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/gipexuxodijutena.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2977/files/banking_regulation_act_1949_bare_act_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/21469923818.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/zanisomam.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_off00006939.bin
1e1d756a9c865d7f72f29c357e2b3933209578b0169a66f4f247af070612371c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6939 4588 bytes
font_01_sfnt_off000078d6.bin
51f13f71ca79d0cd960bd5c41b5d724fc9a2ae4a941362bc5d0812313c34b303
pdf-font-stream PDF embedded font (sfnt) at offset 0x78D6 10468 bytes
font_02_sfnt_off00009c9d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9D 4324 bytes