Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1626d097cde747…

MALICIOUS

PDF

42.7 KB Created: 2020-08-15 01:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b570361650956c09f1b618ee7a51ce6 SHA-1: 34c4d215483796224169b8d06284cb14acf9f063 SHA-256: cd1626d097cde7475ad1f059c13e6b97b0567d8f33a0a8e222e810447abfaabb
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=medical+bills+on+credit+report+2019'. Additionally, it exhibits characteristics of a link farm, with numerous embedded links to PDFs hosted on cdn.shopify.com, one of which is 'https://cdn.shopify.com/s/files/1/0429/6923/5619/files/appendicite_aigue_2020.pdf'. The document body and a low-severity heuristic indicate a fake invoice or payment lure, suggesting the intent is to trick the user into clicking the malicious link.

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.ru/pify?keyword=medical+bills+on+credit+report+2019
    • http://files.milesoftraining.com/uploads/1/3/0/7/130776208/7031240.pdf
    • http://files.alexanderjayweissman.com/uploads/1/3/1/0/131070151/buvekuwo_livaliwojikuv_foxuwosanebadid.pdf
    • http://files.solidwastemanagement2030.org/uploads/1/3/0/8/130813913/ed0c95b7036.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/appendicite_aigue_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/pumeralar.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/rekasoraku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zeperilifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/bozevigom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/samhsa_guidelines_for_buprenorphine.pdf
    • https://cdn.shopify.com/s/files/1/0440/6404/7269/files/centrifugal_pump_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/0067/3950/files/pirigimun.pdf
    • https://cdn.shopify.com/s/files/1/0429/4167/7731/files/vufituzokegiloki.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/soseref.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_off00006967.bin
84f3fcb272ceb96f4cdd18571e9c7b1cf1830fe5bf34314b5d2cda720b6f7564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6967 5696 bytes
font_01_sfnt_off00007ccb.bin
6a206f3c62025d99ced3f578f30d76bd19f9f2c37b80593f0eb25b000baa23cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCB 9768 bytes

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