Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb7c5d938691866…

MALICIOUS

PDF

40.2 KB Created: 2020-07-11 20:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bd49c535624b5a16e815cff7246c5ac SHA-1: ff8729f45878c63f497040e49e878771638e83e2 SHA-256: cbb7c5d9386918668c1a071359a3b1574b96175abdb01baa669a786ec1a70ac9
128 Risk Score

Malware Insights

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

The PDF contains a deceptive link that redirects to a malicious URL, masquerading as a download for an academic document. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the redirection to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm or SEO poisoning attempt to distribute malicious content. The SE_DOWNLOAD_BUTTON heuristic further supports the lure-based nature of the attack.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=a+student+guide+to+maxwell%2527s+equations+fleisch+pdf
    • http://files.birchwoodhealingplace.com/uploads/1/3/0/7/130776143/nivagegiketeru-famevap-mavafezejovupi.pdf
    • http://files.robinlewismusic.com/uploads/1/3/1/8/131871994/b9f068.pdf
    • http://files.ukaydeoro.com/uploads/1/3/0/7/130740458/ponuzizajaxowukosa.pdf
    • http://files.team-change.com/uploads/1/3/1/3/131398177/ruvubazobewemetuka.pdf
    • http://files.thesummitcommunitychurch.com/uploads/1/3/1/8/131871648/1158365.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/nexezodegolovemegafogidip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84860081798.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/30019222646.pdf
    • https://majemim.files.wordpress.com/2020/06/lebokanisadivuximibagil.pdf
    • https://tizatovizux184684867.files.wordpress.com/2020/06/33970087641.pdf
    • https://jusodewajage.files.wordpress.com/2020/06/wodoz.pdf
    • https://napemodifet.files.wordpress.com/2020/07/xonunujaj.pdf
    • https://suzijila.files.wordpress.com/2020/07/36575018677.pdf
    • https://cdn.shopify.com/s/files/1/0434/1684/6488/files/kovavomakavibewupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/61570073773.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/supozukalusasezifiralep.pdf
    • https://cdn.shopify.com/s/files/1/0430/3080/6679/files/76547466104.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/didevebipuzumasutaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/bujimetatipabevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59526866216.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/tagagaxileluxuvogesetulan.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_off00005cf3.bin
8bbdcad4513ca9da020a4b17b3c9f386c838b73fcba35965791c12c195da475b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF3 5664 bytes
font_01_sfnt_off0000701b.bin
8848c8a1c9b2446efa7d7d22a45e19599b60fca9136582739f624ccae6b749ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701B 10312 bytes

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