Malicious PDF — malware analysis report

Static analysis result for SHA-256 b014bc49abf89d67…

MALICIOUS

PDF

56.7 KB Created: 2020-08-25 02:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4087248ad338d8e85b671888323ae73e SHA-1: e5c194ee4a25f1145f42286f88e5f0d65a4264be SHA-256: b014bc49abf89d67c3b65b11ebca594816dec3bb31cdff58cd2a69d9e172f708
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a lure related to financial documents, specifically a "sample checkbook balance sheet". It embeds a significant number of links, with a critical heuristic identifying it as a PDF link farm. One of the primary links, https://ttraff.ru/pify?keyword=sample+checkbook+balance+sheet, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL, reinforcing the malicious intent. The presence of multiple embedded URLs, including those pointing to Shopify, suggests an attempt to distribute malicious content or generate traffic through SEO manipulation.

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.ru/pify?keyword=sample+checkbook+balance+sheet
    • http://files.innovativefinancialresults.com/uploads/1/3/0/7/130776490/9731519.pdf
    • http://files.kdmikulawineman.com/uploads/1/3/1/6/131637419/8259118.pdf
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/2008_chrysler_sebring_performance_parts.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/tiviweto.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/72067194243.pdf
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/26562782808.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/wevojomusoxikepeloko.pdf
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/slaba_tnica_y_slaba_tona.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/fuxakofuxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3777/6289/files/53108485386.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3141/files/25966339996.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_off000094c8.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94C8 2828 bytes
font_01_sfnt_off00009ec2.bin
c899254dbc11e7d508ddbe6b6f9939912165a4c8dfa58aadbebd36a3046369f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC2 5384 bytes
font_02_sfnt_off0000b0e8.bin
1677e101ced073c9e5e9497ae682b78596aa80683e7a2f9eb6ab3d10a36a9875		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E8 10276 bytes

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