Malicious PDF — malware analysis report

Static analysis result for SHA-256 64067b124d10b70e…

MALICIOUS

PDF

48.8 KB Created: 2020-08-30 20:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e41895ec0624460ba04b9600c37ec304 SHA-1: fc8193a0a3bb430d31ce9f57ef474ff5e3d147c4 SHA-256: 64067b124d10b70ed54c3b1e7417812d101f69d1b88f0ccca48ac2f15618d49c
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.me', which is disguised as a driver download. The document body also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious infrastructure. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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.me/wix?keyword=usb+camera-b4.09.24.1+driver+windows+10
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/fewojiliwefu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/kiditito.pdf
    • https://cdn.shopify.com/s/files/1/0431/4805/0583/files/cetoprofeno_gotas_medley_bula.pdf
    • https://cdn.shopify.com/s/files/1/0433/8004/8023/files/rimworld_cheat_codes.pdf
    • https://cdn.shopify.com/s/files/1/0434/3863/7208/files/41758473450.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/59546187802.pdf
    • https://cdn.shopify.com/s/files/1/0463/0727/9013/files/non_biological_nitrogen_fixation.pdf
    • https://cdn.shopify.com/s/files/1/0440/1673/0277/files/zubogopuvimonukilel.pdf
    • https://static.usrfiles.com/ugd/1e32c2_13dff98894b04017b5e429f5d743eb08.pdf
    • https://static.usrfiles.com/ugd/0a052f_63c28806bb784b42b988eb8a1e217822.pdf
    • https://static.usrfiles.com/ugd/43d598_5eb1321bcd08465dafe0c99ba0f65b04.pdf
    • https://static.usrfiles.com/ugd/b11f6d_5e264c30b9c34311b2b85ac01a81ef27.pdf
    • https://static.usrfiles.com/ugd/0df15e_15f5f98b75854cdcaa970e30cf5d17fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_601bd766f9cf48d49a9be0e25766fe9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_593548b0b5c1493f8bb286054310df6f.pdf
    • https://static.usrfiles.com/ugd/5438e3_1d385d3a90944c68bd2714e9020ac56a.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_off000070bf.bin
44873ff23869da879cc53175f7b47373c39cbe2f4ef75c099ecd541629fbcf39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BF 5972 bytes
font_01_sfnt_off0000851f.bin
d6f19ca04b00202ad8728dc24a80a788d77be8506b30994ac7f28fceb3a28a44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x851F 15908 bytes

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