Malicious PDF — malware analysis report

Static analysis result for SHA-256 80258151c8dfabd5…

MALICIOUS

PDF

43.5 KB Created: 2020-09-20 10:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc552b9c06384438ea78d5e1d60b404f SHA-1: 5bc211e4174aade8012f94d4a13c5126efe4d377 SHA-256: 80258151c8dfabd529d6845a0dc3057eea3bf3e253cfd79ea5c10769185a1228
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a malicious redirector, ttraff.me, which is disguised as a search result for a specific manual. This indicates a social engineering lure to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of multiple embedded URLs and the critical heuristic firings strongly suggest a malicious intent to redirect users to harmful content.

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.me/wix?keyword=human+anatomy+and+physiology+lab+manual+marieb
    • http://kixinu.hypnowellbeing.co.nz/uploads/1/3/0/7/130776716/ac97cfd2c02.pdf
    • http://mupud.elisabeautystore-agency.com/uploads/1/3/1/8/131857090/pikeweb.pdf
    • http://pukedovak.wilesmenschla.com/uploads/1/3/2/7/132740280/2086837.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/search_only_fors.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/19250676283.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/72154181844.pdf
    • https://cdn.shopify.com/s/files/1/0437/0186/2554/files/8728484958.pdf
    • https://7496f85d-e4d5-4ca8-b1dd-da3677118b0a.filesusr.com/ugd/c57cae_3411b4ade2d44ca59859846f6e6457b3.pdf?index=true
    • https://8a6b9d7e-2b5e-4548-a354-4528039fbe21.filesusr.com/ugd/98d639_4919f069b9ee418aba50cb735e4598c0.pdf?index=true
    • https://3333e3b7-93e2-4910-ac74-c1755dfb4a03.filesusr.com/ugd/622218_5d083835e8644674820772b9ebefde60.pdf?index=true
    • https://0ee687c2-c75f-43ad-9618-7c82338d6b6d.filesusr.com/ugd/c33cdb_acaf3b4a1f2c4936885289f1e020a54b.pdf?index=true
    • https://2d40cefa-6750-4d30-ab64-09ead755b15a.filesusr.com/ugd/6cabbb_7f6ca53326d64c6f953311a9afbf879c.pdf?index=true
    • https://c0c46580-2bc3-44c3-a94f-411330cf27d5.filesusr.com/ugd/39cb9d_9032336dd66648b5963e60df161e4693.pdf?index=true
    • https://7111bb44-52fd-454c-a69a-ee7d63fcfc24.filesusr.com/ugd/733c1f_26f87815f24d4e138a7c97b0bd63c708.pdf?index=true
    • 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_off000067f5.bin
df8200e9e9d6901aac9883eaeeadb97faa3ee3cca80c26fdfe55ccfdcb97add6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F5 5576 bytes
font_01_sfnt_off00007abf.bin
a9a27ed5402a598b3b64e20a1ba3034daa0ce0eddf1036db47aaf30c56cd8bef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABF 10604 bytes

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