Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb621ab7588e6047…

MALICIOUS

PDF

43.8 KB Created: 2020-09-01 14:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5615f87a38a87733a039ba898a85522a SHA-1: eea5cf9797318433a12838899dd616cab970b65b SHA-256: cb621ab7588e604753403079e886acf72f04b0f24e5b8d4c15748e03833e698e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm, likely for SEO manipulation or to distribute malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=sheet+piles+wall, which is used as a redirector. The document body, though heavily obfuscated, contains this URL, reinforcing its role in the attack.

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/pify?keyword=sheet+piles+wall
    • https://cdn.shopify.com/s/files/1/0428/3206/8775/files/gum_arabic_health_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0440/5536/3734/files/49293598043.pdf
    • https://cdn.shopify.com/s/files/1/0438/4092/9957/files/livugatovanafepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/levuketaditojenopiwege.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7843/files/bsc_agriculture_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/99195639977.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/12074380026.pdf
    • https://cdn.shopify.com/s/files/1/0440/0558/9157/files/brainstorming_in_writing_process.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/lizizusikewesi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/ncert_10_class_math_solution_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/workflow_developer_guide_in_oracle_apps_r12.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/buvarajejepemimovifid.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/jalemesolidiwoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/bericht_schreiben_grundschule.pdf
    • https://cdn.shopify.com/s/files/1/0438/8497/0152/files/ginnie_mae_fha_guidelines.pdf
    • https://static.usrfiles.com/ugd/b8c837_5862d2c5c5884edd852281edacd75649.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc094715d9b24a4fb7148df98740b45c.pdf
    • https://static.usrfiles.com/ugd/ab63e3_34d5fe15df6b44b4abc3f17226e4d336.pdf
    • https://static.usrfiles.com/ugd/b8c837_db9b540fbbe147f8a512187bec583164.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_off00006c84.bin
e52c2799062e434ef0cc64e4b8eec4bf8fec1f89af2fde9218ffb2669be37692
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C84 5008 bytes
font_01_sfnt_off00007d9d.bin
446a095e0a3898e9d802433c2a6953db1426aaee33a81bef8769c7e342cd64e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9D 10636 bytes