Malicious PDF — malware analysis report

Static analysis result for SHA-256 31be8de2fff99fcd…

MALICIOUS

PDF

46.7 KB Created: 2020-08-17 14:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40e6e71a9070d42f330e20af2a0013c1 SHA-1: e64b382dd96512a408cb957033977b7cec134555 SHA-256: 31be8de2fff99fcdc9c56948342335cfd673c8de7b5a1b85c450a878ec49c0d5
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text referencing "Scratch 2 offline editor 2.0" and a URL that appears to be a lure. The primary malicious IOC is the redirector URL which likely leads to further malicious content.

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.cc/pify?keyword=scratch+2+offline+editor+2.+0
    • http://kulomorap.michaelbraunlin.com/uploads/1/3/0/8/130874431/8aaf3683.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/allianz_travel_claim_form.pdf
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/39298093283.pdf
    • https://cdn.shopify.com/s/files/1/0439/1760/7067/files/shakespeare_beaucoup_de_bruit_pour_rien.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/primary_keys_access.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/lipukufibategukazunop.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/vorobowuvonajixaxorovix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0435/8026/0511/files/argumentao_redao.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/58100483954.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/60523251449.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/50876245913.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/remikozibugal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/system_analysis_and_design_notes_for_mba.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/78305727276.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_off0000625e.bin
88ce1eb3454f0ea5e7e48cf51e4adff45782bb0ea21f2c0cc78e7576f1cd9c77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625E 5340 bytes
font_01_sfnt_off00007471.bin
aa06bc37430a03901fc9074c911fca3eae043559cab8c4431ec97db7d72cf5db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7471 10852 bytes
font_02_sfnt_off000098ee.bin
dd9a388fcb144a6ba51f93f71b1b5f80273f5f386ed315a2c4249d443452b30b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98EE 16144 bytes

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