Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a903e353be1e4c2…

MALICIOUS

PDF

35.1 KB Created: 2020-08-07 06:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a5c31be3d8369ab529db0b744cd3941 SHA-1: 310d755825207ce6963d61662ffc29145ebbe372 SHA-256: 3a903e353be1e4c253b892a5906ea11c7075f0ecda3b4b44bcf4947a15296c8a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to create SEO link farms or redirect users to malicious sites. One of the primary links directs to a known malicious redirector, ttraff.com, disguised as sheet music. The document body is heavily obfuscated, but the presence of the malicious URL and the link farm heuristic strongly indicate a phishing or redirection attempt.

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=bee+gees+words+sheet+music+pdf
    • http://files.strategicproposalsllc.com/uploads/1/3/0/8/130813988/logobatidadudoxaruki.pdf
    • http://files.korensullivan.com/uploads/1/3/2/8/132814250/mipatekikimizibuboxe.pdf
    • http://files.angelaprior.com/uploads/1/3/1/3/131381540/wipexebixaxij.pdf
    • http://tufavak.beachcitypestcontrol.com/uploads/1/3/1/8/131872225/701cc8c2b4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/zoravesoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/fokekodisavekipibawowoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/pirise.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/52947132056.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/27981901865.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/adjectif_verbal_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0775/files/45056455068.pdf
    • https://cdn.shopify.com/s/files/1/0435/3851/4071/files/modified_alvarado_score.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/acrylic_color_mixing_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/93948008882.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_off00004a11.bin
8baf78cda932bc8cbf01e08dc4cbbabf30806ad0138c2dca4b76948a7238adec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A11 5468 bytes
font_01_sfnt_off00005ca3.bin
61a864ed8769c090e59acdf0b81a1a85af805e5bb3917027d0daf4ffb087b2c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA3 10336 bytes

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