Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b12a400c60ef9d…

MALICIOUS

PDF

42.2 KB Created: 2020-09-05 22:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b08c691e5154b31db8e6c5cdd84d9c1b SHA-1: 4158738e165d085979760ea56ee09c415d5cda6e SHA-256: 24b12a400c60ef9dcf030f9f1396901d9e5cf54fd0b49ecd63da32d823957236
150 Risk Score

Malware Insights

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

The PDF file contains a prominent link to 'ttraff.club', which is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to a 'free international calling app for android' and the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links, many pointing to Shopify domains, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=free+international+calling+app+for+android
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/butap.pdf
    • https://cdn.shopify.com/s/files/1/0434/2507/1256/files/plague_inc_apk_espaol_1._10._1.pdf
    • https://cdn.shopify.com/s/files/1/0429/2257/3990/files/90223503859.pdf
    • https://cdn.shopify.com/s/files/1/0461/8479/2217/files/fatal_frame_ghost_list_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/gadixazomibetu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0438/9273/6155/files/hidrocarburos_aromaticos_quimica_organica.pdf
    • https://cdn.shopify.com/s/files/1/0428/9963/6390/files/60392344206.pdf
    • https://cdn.shopify.com/s/files/1/0428/5353/1807/files/dumagofurumebepofifasobe.pdf
    • https://static.usrfiles.com/ugd/0dd040_59f54048f03b4dfa8042a22714102fa2.pdf
    • https://static.usrfiles.com/ugd/e8506d_f5a71bd38dc046868d9a8b4bf99f267f.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_96d1b71e6c5345cb94799d3e77b6d368.pdf
    • https://static.usrfiles.com/ugd/003b86_3cdc7c4b9de94307ba2923063f75f398.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_28239aa9a95b43f7aa7534b4a539961e.pdf
    • https://static.usrfiles.com/ugd/5be868_b04f35b4b2ae48c5a3f7df4cd2382817.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a87aba0e8764feda54d5ba9866ba59c.pdf
    • https://static.usrfiles.com/ugd/77941b_efa367fe45574564876b01be5c28ae8a.pdf
    • https://static.usrfiles.com/ugd/0e2875_aac23de685c642b39468a00bc8bff489.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_off0000666a.bin
e530887ca4ee7fc564fde0de82f1fad9ed0ed5e2f3e301aff5809ae4409c1309
pdf-font-stream PDF embedded font (sfnt) at offset 0x666A 5100 bytes
font_01_sfnt_off000077d8.bin
aff78f3d4f930f8ff3397299f395fdde335b2fb22c85c780475ea27da3fa88ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D8 10804 bytes