Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed10c3b7bd59e5ef…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 23:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58822cdbb7359b8bc207db6cb3689db4 SHA-1: fbf1b675fa1b042fb73dcc5e52b7d5d2cbb178af SHA-256: ed10c3b7bd59e5ef5ec69c733fb172d53e6c746dfe59d2cb4c279e8f225736db
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many hosted on Shopify, designed to appear as legitimate documents. One primary link, however, redirects through 'ttraff.ru', a known malicious redirector, to a URL containing 'leagueadda app for android'. This suggests a phishing or scam attempt using a link farm to obscure the malicious destination. The document body is heavily obfuscated and contains the malicious redirector URL.

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=leagueadda+app++for+android
    • http://files.ameafterdark.com/uploads/1/3/2/7/132740408/puruwopujolenuma.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/nasebotifowomiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/pixotatogofu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4954/7938/files/kisasovugomusavor.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/letterhead_sample_doc_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/44073421301.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/billie_s_bounce_partitura.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/soragag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71135401618.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/2441725181.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/bses_rajdhani_new_connection_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5619/files/sigma_aldrich_catalogue_2020_20.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_off0000667a.bin
a00ccb4ca08b112793240addadeb77ac6bc7a650e3216cd243226d98678f4577		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667A 4940 bytes
font_01_sfnt_off0000775c.bin
736fbd78d9e58d0a8c6a1b259a1be1b6cc45641eb9976694eb2fc439a831a990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775C 10288 bytes

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