Malicious PDF — malware analysis report

Static analysis result for SHA-256 44676b8ffffc35b4…

MALICIOUS

PDF

41.9 KB Created: 2020-08-30 02:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b4f135c7abe6e045bcc2730fcf09d60 SHA-1: 7d30b34a007c06374fe4c2b25455fd2a1e3075bd SHA-256: 44676b8ffffc35b4932595a4a0414e8316eb53af8bfe8ee50fd2c2bbca048536
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDFs hosted on 'static.usrfiles.com' and 'cdn.shopify.com', suggesting a link farm or SEO poisoning attempt. The primary malicious link is likely intended to redirect 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/wix?keyword=janeway+immunobiology+9th+edition
    • https://static.usrfiles.com/ugd/a771bd_ea2960e6a37c496bb2819264f5d58488.pdf
    • https://static.usrfiles.com/ugd/f84671_0c4ba4f0749a42038fa3a2d48d0b0abb.pdf
    • https://static.usrfiles.com/ugd/e4ff69_ab4695c3bde44a1a984758e33e7bb615.pdf
    • https://static.usrfiles.com/ugd/69695d_1ffef9daf658494ebff7429c8e5ad72a.pdf
    • https://static.usrfiles.com/ugd/67f5f7_03046f1fe58d4ffcb1a314cbe121382c.pdf
    • https://cdn.shopify.com/s/files/1/0435/5014/6723/files/97330591670.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/aac_to_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/bewifobesinesis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/zitijosezanuxunojigomum.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/fimigifegoru.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/alimentacion_y_nutricion_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0434/8585/5897/files/1209111400.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/6628401048.pdf
    • https://cdn.shopify.com/s/files/1/0429/3220/7782/files/dosis_cefotaxime_anak.pdf
    • https://static.usrfiles.com/ugd/f515ca_b3e64997f0ca4dfa90a74e62b5a91afa.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb337cc5f30340fc93be43de54c95934.pdf
    • https://static.usrfiles.com/ugd/3b47cb_607173e4d07441c783f222e431f97c4f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053d1.bin
6e071e8fbb41de6cf230caa75806f8b866b42e24eda335a5298817e09f53952e
pdf-font-stream PDF embedded font (sfnt) at offset 0x53D1 5444 bytes
font_01_sfnt_off0000663c.bin
43d621eb9f2f3676facf59dbd91e780f343c531c532bdc391366874b6ee60b77
pdf-font-stream PDF embedded font (sfnt) at offset 0x663C 6628 bytes
font_02_sfnt_off000077e6.bin
3dea56c3b515696647752f120d7d4fa262792643b041c7965f2e685d28eb7139
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E6 10040 bytes