Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a717c52e8f5af64…

MALICIOUS

PDF

40.7 KB Created: 2020-08-05 12:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 682ed60dc4227708e0f1f70288b8df3a SHA-1: f79400e52372026e595731da74fce7a6ace2d379 SHA-256: 8a717c52e8f5af6404baae4eb2c210a0c186e91d51374d2ff08e0777c4b1e2c8
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'arthritis uk back pdf' and the malicious URL. The primary attack vector appears to be a malicious redirector link designed to lead the user to a harmful site.

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=arthritis+uk+back+pdf
    • http://files.sahityasangam.org/uploads/1/3/0/8/130814258/sijabusuwifubum.pdf
    • http://files.suncoastfl.org/uploads/1/3/1/4/131408371/fijodixo.pdf
    • http://jojed.juliesenf.com/uploads/1/3/0/8/130874254/wizezokova_pukutojefake.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/48515709864.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9544/files/sears_garage_door_opener_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/71170397287.pdf
    • https://cdn.shopify.com/s/files/1/0439/0633/4888/files/68249071875.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0487/files/batokurewosul.pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/how_to_calculate_percent_recovery.pdf
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/14125451187.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/72553183598.pdf
    • https://cdn.shopify.com/s/files/1/0446/0858/5891/files/skyrim_anti_crash_mod.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7321/files/26985614156.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/sirojex.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_off000061f4.bin
90d25d44198176c1d5fc97aa1f80e07aad6b008c70ae6f7a37ef3147dd4b4d5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F4 5404 bytes
font_01_sfnt_off0000744b.bin
801b8bc5ca6ccae91e544a3fc539fd3133e90f2765209d423de28a8bffe96d1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744B 10012 bytes

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