Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3b5703b03386f9…

MALICIOUS

PDF

50.9 KB Created: 2020-09-01 03:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc00444590a4cda4a2f3a19e4d2995af SHA-1: 805a68ac514d04b8f42bb875f2d39cee15cb3b16 SHA-256: fc3b5703b03386f9027525e0981a4cbb814ff6e861a5267bda0c573502f4cd0c
128 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a datasheet lure, and the PDF_SEO_LINK_FARM heuristic suggests a large number of similar links were generated. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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.cc/wix?keyword=crucial+bx500+120gb+datasheet
    • https://www.comx.co.za
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/80366193188.pdf
    • https://cdn.shopify.com/s/files/1/0432/7158/5952/files/bsnl_broadband_new_connection_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/20843104391.pdf
    • https://cdn.shopify.com/s/files/1/0440/1286/3638/files/tikezudafobo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/free_tecumseh_small_engine_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0462/7136/5277/files/1524659302.pdf
    • https://static.usrfiles.com/ugd/b8c837_da5cbadefd1b449c8b1031826a4d9e80.pdf
    • https://static.usrfiles.com/ugd/a01749_42964e32be934ed5a4384d3bbc495f1e.pdf
    • https://static.usrfiles.com/ugd/89c6ad_4788747175f84f388e2835399de18d43.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/41851381001.pdf
    • https://cdn.shopify.com/s/files/1/0438/9352/2587/files/52898572747.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2821/files/41387655867.pdf
    • https://cdn.shopify.com/s/files/1/0470/9299/0110/files/java_string_manipulation_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/56028500493.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_off000083a1.bin
8428d1fdf87af05403b3f428ca0cada01e13909282faaebbe11dfcc654929086
pdf-font-stream PDF embedded font (sfnt) at offset 0x83A1 5764 bytes
font_01_sfnt_off00009739.bin
05729cf03693905eab1aceb89a2e195f37eeb2a74640857d22100cfededaf425
pdf-font-stream PDF embedded font (sfnt) at offset 0x9739 12180 bytes