Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b154f31c7cb822…

MALICIOUS

PDF

40.9 KB Created: 2020-08-06 16:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f077294afa47216c873d872691d19d4 SHA-1: 01c2cb2dc07e8c43915935965d74643037dea30f SHA-256: 82b154f31c7cb822af582065877e07c361c22e41b31c4dda53e59cdfffbb55f9
128 Risk Score

Malware Insights

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

The PDF document contains embedded links, one of which points to a known malicious redirector. The document body text and heuristic firings indicate a lure related to "carers allowance forms pdf", suggesting a phishing or scam attempt. The presence of a link farm further supports the malicious intent of distributing malicious content or driving traffic to malicious sites.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=carers+allowance+forms+pdf
    • http://files.billelenbark.net/uploads/1/3/1/3/131384429/tatizewadub.pdf
    • http://files.estebanmontesinos.com/uploads/1/3/2/8/132816042/fc85849bf8.pdf
    • http://files.bluestarrichmond.org/uploads/1/3/2/6/132695517/9471766.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/36721192500.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0422/files/daworufuluxeper.pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/tadukefovaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7901/5327/files/zalefafiragenaber.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/schneider_switchgear_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/jaxilegegadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/47198029422.pdf
    • https://cdn.shopify.com/s/files/1/0440/3003/4085/files/46194117016.pdf
    • https://cdn.shopify.com/s/files/1/0430/7491/2410/files/bajuzomibepiwaribozajikem.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/19078218921.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/nomemijugedowukegal.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/sim_code_for_shift_register.pdf
    • https://cdn.shopify.com/s/files/1/0436/3884/9694/files/69819854439.pdf
    • https://cdn.shopify.com/s/files/1/0437/6716/9173/files/vatimoregipijegukutoduvem.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_off0000628f.bin
453fa60f1e4b7af9b9d32eed39bfa79ec16f8ef732c22a673dd46a5803273de1
pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 5296 bytes
font_01_sfnt_off0000748e.bin
00bfda8e70d5d6faa5145e19267df21afaef71a3d079dfc936a43679afa2e328
pdf-font-stream PDF embedded font (sfnt) at offset 0x748E 9944 bytes