Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d65bc7a7f7eeb8…

MALICIOUS

PDF

58.4 KB Created: 2020-08-02 03:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f111e8c5038b285ae28e671b90468fae SHA-1: ebe8f53360fadb0b0c41986ffae2ae94906f3e9b SHA-256: 15d65bc7a7f7eeb891b67a8b13ad48af9611b018cc7faad3796384c484ff3b08
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector service (ttraff.com) which is flagged as malicious. This redirector likely leads to a malicious payload or phishing page, disguised as a download for 'Windows 7 live cd iso download'. The PDF also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of malicious redirectors and the lure text indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=windows+7+live+cd+iso+download
    • http://files.nakomahomesandland.com/uploads/1/3/2/3/132302824/solaxufafedubil-luwuliloje.pdf
    • http://files.europacoffeeshop.com/uploads/1/3/1/4/131483371/tabuluronevit_putujubuw_nipid.pdf
    • http://files.discoveryresourcesllc.net/uploads/1/3/2/6/132695828/dutid-jokemetufeta-befutosi.pdf
    • http://files.lethbridgespiritualistcentre.ca/uploads/1/3/0/7/130739779/nulanitoxoxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/kavufupizapepavugoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/19536949898.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/buzajemizefavadasonexagef.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/pasezanafijipila.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/99183781330.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/valvoline_oil_filter.pdf
    • https://cdn.shopify.com/s/files/1/0427/5542/4423/files/hunter_programable_thermostats.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2088/files/nukotusatuda.pdf
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/81309832182.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/vixonitigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/fepifivufanubuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/rulezabudavuxisemot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tutokufumetuja.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a55d.bin
2af09fa1ef8081ceef4bc2ae665f1f386f860c8c5de604ff6df79478ee8e4580		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA55D 5084 bytes
font_01_sfnt_off0000b6de.bin
ac9396158facbc22353b05652964348ff86bc77d1a0a2d853556bd358f5b395d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6DE 11044 bytes

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