Malicious PDF — malware analysis report

Static analysis result for SHA-256 4882593208320e6f…

MALICIOUS

PDF

45.3 KB Created: 2020-08-07 13:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3e063f776c1ef048a199f1fc0b8e8da SHA-1: fc2ff5d3652d57833350e0a624c15773e1761be1 SHA-256: 4882593208320e6fe724690d451e638893fbbbf9cb24a70ff357767aab08a7eb
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an HDFC bank pay slip, which is a common lure for phishing or malware delivery. The document body and embedded link structure indicate a deliberate attempt to host numerous links, likely to obscure the final malicious destination. The primary malicious IOC is the redirector URL: https://ttraff.ru/wb?keyword=hdfc%20bank%20pay%20slip%20pdf.

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/wb?keyword=hdfc%20bank%20pay%20slip%20pdf
    • http://files.franksrockyhill.com/uploads/1/3/1/4/131437363/2301299.pdf
    • http://files.wildrootsskinbody.com/uploads/1/3/1/4/131437822/zajasolamo_nadekosufun_botoka_xepagokivo.pdf
    • http://files.kim-bella.com/uploads/1/3/1/3/131380786/ef9375b8.pdf
    • http://files.lakewoodmanor.ca/uploads/1/3/0/8/130874668/guzevi-gepitapu.pdf
    • http://files.ecrcme.com/uploads/1/3/1/3/131380889/95b954b848c1ad.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/jejuki.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/fimilu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6122/2307/files/sylvester_stallone_nude.pdf
    • https://cdn.shopify.com/s/files/1/0435/6915/2163/files/javascript_iterate_over_object.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/97473863637.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/34982600514.pdf
    • https://cdn.shopify.com/s/files/1/0438/8398/7096/files/19720163145.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5762/files/14992791309.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8959/files/js_empty_function.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7642/files/tuzijudamabuduvepafew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaragevutaxesidep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9655/6191/files/kagefimeziruti.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/luladig.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_off00005d27.bin
113566204fc67a71156487544e1fa82eb1ecf70f121514a64487ed7d3c6ae228
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D27 5320 bytes
font_01_sfnt_off00006f5c.bin
067aa3694d2a0b32c2802d7b27d2cb5ac25a7c8ea4edaf047e7c1b9da7093ca7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 10248 bytes
font_02_sfnt_off000092b6.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x92B6 16164 bytes