Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b15e840561cb417…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 11:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 741692a9ee531aa1acdf3d1fd433095f SHA-1: cccc24212ecafce6a6dbef4255ccf6b804e9739e SHA-256: 9b15e840561cb41711a1508a513990fc52538524d1cf8f9e7f22f9187b623a3a
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=reporting+cronbach%2527+s+alpha+spss'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links, many hosted on potentially suspicious domains. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. The primary attack pattern involves tricking the user into clicking a link that leads to malicious infrastructure.

Heuristics 3

  • 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.
  • 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=reporting+cronbach%2527+s+alpha+spss
    • http://bozazo.tinytownllc.com/uploads/1/3/1/4/131452938/72b8fd4.pdf
    • http://govodi.dna-audio.com/uploads/1/3/1/3/131384279/gupumijelekidiv-netotabivufo.pdf
    • http://files.littletheorem.co.uk/uploads/1/3/2/6/132681415/2442107.pdf
    • http://files.tcrcatering.com/uploads/1/3/1/4/131437632/663fd4a.pdf
    • http://files.marosenbergartist.com/uploads/1/3/2/6/132695828/1275055.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9628/files/github_delete_a_branch.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/71686136231.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/fallout_4_shipbreaker.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/95538836392.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/angularjs_autocomplete_directive.pdf
    • https://cdn.shopify.com/s/files/1/0440/3966/7877/files/32748810511.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/96115297766.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.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_off00005f02.bin
0321720058279cd6c25a37d7e3730f3553c3d5ef51b8bbb63242daf09f5f8e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F02 5376 bytes
font_01_sfnt_off0000714e.bin
a6f7903548f235cff533b07885bec4c2770db00b557d839c1d2dc3cd5fdb0281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714E 10524 bytes

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