Malicious PDF — malware analysis report

Static analysis result for SHA-256 5935ef39c3813d58…

MALICIOUS

PDF

46.7 KB Created: 2020-08-11 16:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b3940b3f4f8011612e6d92c4f614438 SHA-1: 937d3cf25b520b3aaf33dc75d405ebd3d7f8c33a SHA-256: 5935ef39c3813d58eeaa85eacb66aa0dc806aebe018133b97ad9fa5f923cc02d
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.ru/pify?keyword=avinash+dixit+game+theory+pdf', indicating a lure to disguise malicious activity. The presence of a link farm and a malicious redirector strongly suggests the intent is to lead the user to a compromised or 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=avinash+dixit+game+theory+pdf
    • http://files.sistersvacationrentals.net/uploads/1/3/2/3/132302982/4370307.pdf
    • http://files.millhousefloristry.co.uk/uploads/1/3/0/8/130814070/wazapevija.pdf
    • http://vixotafi.pennyfarthingshop.com/uploads/1/3/1/4/131453870/2057459.pdf
    • http://files.ruthworkssf.com/uploads/1/3/1/4/131408465/sozikaxabefobali.pdf
    • http://tojujodop.ofcpineapplepoker.com/uploads/1/3/1/6/131637030/55d38.pdf
    • https://cdn.shopify.com/s/files/1/0429/2411/4076/files/40508912262.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4338/files/campbell_biology_11th.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/kakibuziwimojapukuvek.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/88553470516.pdf
    • https://cdn.shopify.com/s/files/1/0434/4211/0631/files/puxejuxirosal.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5072/files/lugaguriluru.pdf
    • https://cdn.shopify.com/s/files/1/0436/8020/2905/files/xuxalabax.pdf
    • https://cdn.shopify.com/s/files/1/0438/9250/6779/files/carcinoma_folicular_de_tiroides.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1535/files/playboy_magazines_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6693/9799/files/jeff_beck_net_worth.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_off00006900.bin
4b905ca19c7d0d7d8fce6be8c8a6248a5822cd5ba1f94f1a99bcea1dcaab6fcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6900 5432 bytes
font_01_sfnt_off00007b4f.bin
51ccfda39af294159972b2db93ff98db8a1584d732bc7e35fcb5c501fb7733e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4F 10656 bytes
font_02_sfnt_off00009fb2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB2 4324 bytes