Malicious PDF — malware analysis report

Static analysis result for SHA-256 331115427aa96c71…

MALICIOUS

PDF

47.7 KB Created: 2020-08-29 09:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98c81229cfd95692f20d64d0c5f50c24 SHA-1: 528e7394ca93198303319c930029abd17ce6905d SHA-256: 331115427aa96c71f846833f51bd72b359782c4e50638cab0bf00949c5a18ed9
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body also contains this URL, alongside a large number of embedded links to Shopify domains, suggesting a link farm or SEO poisoning tactic. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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.ru/wix?keyword=cara+mengaktifkan+camera+2+api+android+pie
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/xubonaxobiwapigajevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/nokesutozerelejamelosot.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/24898855543.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/wolomawojovu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/aadukalam_tamil_movie_cut_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31903895201.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/sewalux.pdf
    • https://cdn.shopify.com/s/files/1/0438/6314/6656/files/66953269746.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1cf448b6cbc46a68b31134152d4f845.pdf
    • https://static.usrfiles.com/ugd/b8c837_8407fabb433c446f83787e813b810676.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a6ee4b485994e83a8f61d18f6b92ae3.pdf
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/xipujipawoxadug.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/ihk_koblenz_berichtsheft_vorlage.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/38761346860.pdf
    • https://cdn.shopify.com/s/files/1/0439/3861/1355/files/45886640124.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_off00006643.bin
9d0803f0bb805ffcb014e56f767ba1cb2ee8394ffacee17ca67af65da9866f78
pdf-font-stream PDF embedded font (sfnt) at offset 0x6643 5364 bytes
font_01_sfnt_off00007873.bin
25c9fd88bb094fcddf21378a3ce62268bddccf09f50abb18a6785080575c500c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7873 10252 bytes
font_02_sfnt_off00009bbc.bin
b098ed48168e6b542e33e7bcb120c7a96700ac58cc823e9ee33b427e593cd245
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BBC 16224 bytes