Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ae7ab913265ff7…

MALICIOUS

PDF

40.6 KB Created: 2020-08-19 05:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c16acfc81a4f5623d637504af900ecc5 SHA-1: a29f26fac7f0c602017fa744ef00cde0918e08fe SHA-256: d3ae7ab913265ff7e257e61febca8c1f20b9ab72c030bab1c6f752f7e1875df6
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to ttraff.cc, disguised as a CDC flu report. This indicates a phishing or scam attempt to redirect the user to malicious infrastructure. The ML classifier strongly supports this assessment.

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.cc/pify?keyword=cdc+flu+report+2018
    • http://files.nickhupton.com/uploads/1/3/1/3/131383838/dozujaxevasiv.pdf
    • http://files.holywellwalkersarewelcome.org/uploads/1/3/1/4/131453005/xurejivar.pdf
    • http://files.taylorhwilliams.com/uploads/1/3/0/9/130969370/766decf37e3.pdf
    • http://files.alchemyherbalnn.com/uploads/1/3/1/8/131871994/zitapom.pdf
    • https://cdn.shopify.com/s/files/1/0435/9825/0146/files/paraluputefamujupenexinul.pdf
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/wigukidiwulufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6365/6099/files/50938634627.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9267/files/nudejatotorelunatipubemiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/dunuxoxafuvi.pdf
    • https://cdn.shopify.com/s/files/1/0454/5295/1704/files/addict_with_a_pen_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/baponufozozurakog.pdf
    • https://cdn.shopify.com/s/files/1/0441/2211/2152/files/binodini_rai_song_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9319/files/bacteriostatic_and_bactericidal_antibiotics.pdf
    • https://cdn.shopify.com/s/files/1/0438/1409/2960/files/ieee_pes_transactions_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/fungi_lab_report_introduction.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_off00006103.bin
ce722871807136116693f8ad77df861bc7df365fd01447ee129f7a7410c72f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 5184 bytes
font_01_sfnt_off000072be.bin
6410d30f4a61dbd81b4fc5678e6423c41d7331b06438a2aafc9c48c54d5dad99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BE 10244 bytes

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