Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d4b728687b8f39…

MALICIOUS

PDF

46.5 KB Created: 2020-08-02 16:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 072d6c11ca6e5bbf412d12c5480db99e SHA-1: b380cd27a5dabf6d26f7548dbb2179e5b505dbfa SHA-256: 78d4b728687b8f3900a5024834d8ab16a0b5a7cdba2d3188e773ce9256326bfc
220 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=chrome+view+source'. The document also employs a social-engineering lure, instructing the user to install a browser update or extension to view content. This combination suggests the primary goal is to trick the user into clicking malicious links, which could lead to credential theft or the download of further malware.

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=chrome+view+source
    • http://files.sterlinggracebrethren.org/uploads/1/3/1/4/131453451/11229029c98.pdf
    • http://files.myerstownboyscouts.org/uploads/1/3/1/8/131871453/64739.pdf
    • http://files.acquisdata.com/uploads/1/3/0/7/130739883/6805283.pdf
    • http://files.risingnorthproperties.com/uploads/1/3/0/8/130874284/nedaxenojexiv_depoteter.pdf
    • http://files.vwpitstop.com/uploads/1/3/1/3/131380495/8659607.pdf
    • https://cdn.shopify.com/s/files/1/0431/9484/3298/files/bubamifidoserixe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4204/files/82085467607.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/gukibifetavokogonabotuwib.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/91478859116.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/68290585195.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/17832115095.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/74790317614.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/3586254873.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22411539251.pdf
    • https://cdn.shopify.com/s/files/1/0429/3830/2627/files/roar_tigers_of_the_sundarbans.pdf
    • https://cdn.shopify.com/s/files/1/0437/6179/5230/files/82594956574.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/vikap.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/13293866601.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_off00006bee.bin
a48fb749a5815d10d1af40fc8306759e299ab6f28a4a20dd221e9fcdfd85a5cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEE 4668 bytes
font_01_sfnt_off00007bdd.bin
141794a264b65d5f0dc8b621187639d5b5f9a2621ec41bcce9d0d3a5e6b2158a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDD 10200 bytes
font_02_sfnt_off00009e74.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E74 4324 bytes

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