Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85ddcd06c65fa88…

MALICIOUS

PDF

33.7 KB Created: 2020-09-19 06:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62b5303081131ad03a1ac284069220cc SHA-1: ed6e4fcb7985524d29f33060cc95b13855cebe54 SHA-256: a85ddcd06c65fa8811823e9a0bc3f26ad1ac9b72f60418f803cb8ccbf447536c
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including one pointing to a known malicious redirector at `https://ttraff.club/wix?keyword=small+engine+manuals`. The document body, though heavily obfuscated, appears to contain text related to manuals and the tool used to generate the PDF. This suggests a social engineering attempt to trick users into clicking malicious links disguised as helpful documents.

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.club/wix?keyword=small+engine+manuals
    • http://buxatigi.janlowefineart.com/uploads/1/3/1/8/131856669/figopob.pdf
    • http://files.kooenergy.com/uploads/1/3/1/3/131398406/pifamij-rumolokakela-vodizanuwez-pogemedituno.pdf
    • https://9ff5e973-8b87-48a3-a217-e4b48233ef01.filesusr.com/ugd/26481d_716e1e7806c0467c8f073dc62ce4f5fb.pdf?index=true
    • https://0ad43ba0-f0b5-413c-9d88-e2f9eb592123.filesusr.com/ugd/bbd3cf_952b5ba74e2e48a0aac1c34ed4c617ee.pdf?index=true
    • https://480055b7-69d6-41d3-bdfb-ea9b06c91470.filesusr.com/ugd/07ef24_4d8b27339ea34db388e09f5f97f7c0c9.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/gst_voucher_entry_in_tally.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/bombastic_brothers_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/45458530642.pdf
    • https://cdn.shopify.com/s/files/1/0463/3572/1634/files/zigirekezisowuwiwub.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/zepup.pdf
    • https://c7f72524-1c22-4394-b6ee-25352022b283.filesusr.com/ugd/cdfdba_80ea81a09bca43bd828bf9a329f3469c.pdf?index=true
    • https://5110f740-0b66-44a7-b510-d3d73edbff6c.filesusr.com/ugd/77d535_92d41a5ba1034867a9b250aa7767f607.pdf?index=true
    • https://03e64390-0c38-42be-a438-49749421d5ea.filesusr.com/ugd/120874_666322c3e52b47da8b878e4e85b592ec.pdf?index=true
    • 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_off000046c3.bin
4fea9973b7cf87b4ed7fb476cd1bcf57c9300793d0adab238396d4b3a4992026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C3 5012 bytes
font_01_sfnt_off000057b8.bin
a9cf526f30c99ef31f9d3566a9fa0583efe68b0971cf0780832aa5ca7fa9edc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B8 10752 bytes

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