Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ee5587207c29db…

MALICIOUS

PDF

33.4 KB Created: 2020-09-01 03:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff16bac5f43739cd5d62fcd47d939a80 SHA-1: 00ce53882aa99c88a3c36a307f94d06ee91beba3 SHA-256: 31ee5587207c29dbd6eb858c2c24fdb6b70a78fb4dcf01d1344e54b9cbbee676
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body explicitly mentions 'ccleaner pro win 10' and includes the malicious URL, suggesting a lure to download potentially unwanted or malicious software. The presence of a password-protected archive lure indicates an attempt to bypass security controls.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/wix?keyword=ccleaner+pro+win+10
    • https://cdn.shopify.com/s/files/1/0431/0115/9585/files/89832352223.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/21022871444.pdf
    • https://cdn.shopify.com/s/files/1/0441/1057/7816/files/diablo_3_season_14_leveling_guide_crusader.pdf
    • https://cdn.shopify.com/s/files/1/0429/0147/1388/files/fujisadiguson.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/37768376799.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/linux_administration_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/36813591125.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/lupivetibigokusetim.pdf
    • https://static.usrfiles.com/ugd/d5d855_1d37e758e22f4f0b8bb3896d81cd1309.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_b85c7a07ba274477b62b9fbb4ae2a4d0.pdf
    • https://static.usrfiles.com/ugd/cb5dea_029a1c7917de454fb0b88cfa8a55f46a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004741.bin
6b04db5ab8d243658ac6605c811edda13d1f0c4dd13b6c0526389af7a5c9e038		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4741 4940 bytes
font_01_sfnt_off0000582f.bin
8f0309b12ea065d9784e7bb4455eeb49ea839fbe183399dbae7a09d4dfa25015		 pdf-font-stream PDF embedded font (sfnt) at offset 0x582F 9780 bytes

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