Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd4a44d490eed6a…

MALICIOUS

PDF

57.1 KB Created: 2020-08-31 08:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ac76e00a54492d36c49c59d12c006aa SHA-1: 14bcf62475378267ceaa3c98f3b11e9585bd0ebe SHA-256: cfd4a44d490eed6a9a4ae918a19233abd4b79f2b591f7e60ff6457189450561a
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure related to a game, directing users to a malicious site. This suggests a phishing or malware distribution attempt. The presence of numerous external PDF links, many hosted on Shopify, further supports the idea of a link farm designed to obscure the malicious destination.

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.ru/wix?keyword=sims+4+gardening+career
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/technical_interview_questions_and_answers_for_cse_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/xajoxegar.pdf
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/sijimu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6859/7158/files/28084222740.pdf
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/zelijefamekilatewoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/9676504276.pdf
    • https://cdn.shopify.com/s/files/1/0436/1191/4403/files/kugefigimimusotop.pdf
    • https://cdn.shopify.com/s/files/1/0430/0737/7561/files/2252471270.pdf
    • https://cdn.shopify.com/s/files/1/0459/6049/5263/files/91972953465.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/examples_of_good_lab_report_introductions.pdf
    • https://cdn.shopify.com/s/files/1/0437/8496/2199/files/present_perfect_tense_worksheets_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/99427531891.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0822/files/55482134351.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/goldfish_buying_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/7163/3563/files/lotewipidapurininifiwod.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_off00009151.bin
f66206d9173f807424074f11738294f7737ccbebee9daf319d39ee5bedfaa64c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9151 5420 bytes
font_01_sfnt_off0000a393.bin
1bbb995726c00b9812a117f774d6eebf4996b444b9057f31993f9a83f058a1cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA393 2904 bytes
font_02_sfnt_off0000af89.bin
65ec12602ae2b9b3be694936e1502c757c6c2ad41908555dc79292f0c4fe0478
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF89 12228 bytes