Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c76624db766ea5…

MALICIOUS

PDF

53.6 KB Created: 2020-08-19 19:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7be0369afe43ad95ad53d5302fe69c95 SHA-1: 80bc07df6d657d46ea76e41604a40f8dbbb8cd12 SHA-256: b7c76624db766ea59dbc0244aa6987d74371c912c7c315086537e488f12fc8ae
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a mass external PDF link farm. One of these links, https://ttraff.com/pify?keyword=bobinas+de+encendido+automotriz+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to redirect users to malicious content or for 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.com/pify?keyword=bobinas+de+encendido+automotriz+pdf
    • http://files.eatsxm.com/uploads/1/3/2/6/132681647/7001933.pdf
    • http://junofevox.studydominica.org/uploads/1/3/0/7/130738615/93860.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/gejex.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/velomusoforavuwa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8085/7253/files/41938950506.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6925/files/85248715810.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/masinatitakojedup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1080/files/mulive.pdf
    • https://cdn.shopify.com/s/files/1/0450/9820/5349/files/91802900381.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/82915415738.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/risixiwunogit.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/arabic_personal_pronouns.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/5574006286.pdf
    • https://cdn.shopify.com/s/files/1/0451/7930/6135/files/49285221145.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_off00008592.bin
c720de1f2c7bc4fe9f835d13c80cbaa0457f8c047c4c00eea1fce40b49c6e747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8592 5388 bytes
font_01_sfnt_off000097c7.bin
facf08d684c44e43299966a714a3411c0561e93a4a80b4edb5423cf9750befd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97C7 10816 bytes
font_02_sfnt_off0000bb07.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB07 4324 bytes

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