Malicious PDF — malware analysis report

Static analysis result for SHA-256 71514c2587a34f93…

MALICIOUS

PDF

46.6 KB Created: 2020-09-17 09:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2e9e5861ab515881697b9d0809614a9 SHA-1: 9a26999e141c2b1878bd479f657f7980d18cda05 SHA-256: 71514c2587a34f936dc6bc4744a6cc81df0396812979738983d68699229033ad
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector URL. This behavior is indicative of a link farm designed to obscure malicious destinations. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which likely leads to a malicious payload or phishing page.

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.link/wix?keyword=jeremy+runnells+mormon+stories
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://24cbfadb-1610-4e87-98a5-419c00eabb09.filesusr.com/ugd/35ddae_72b71b860a5b4fc9b449d71ed56ed73e.pdf?index=true
    • https://79972f10-d0ff-467d-90b2-ff4bc9799253.filesusr.com/ugd/6c032c_e81c68f5e0604917b1f1be61cb3de710.pdf?index=true
    • https://86de5f34-803c-4ae0-adcd-081ef02b5192.filesusr.com/ugd/221eaa_7ea7d64ddef54e0ba24e55aaebb0ba8c.pdf?index=true
    • https://34cba82b-20f3-4b94-b80b-94b5b8fc1dd2.filesusr.com/ugd/01bc73_2eb7aff073d944829b0e725fd2d17fdb.pdf?index=true
    • https://9f35ba73-fa07-43f8-a9e6-2377c85a8bcd.filesusr.com/ugd/a8cc01_707bf4c970024d5eacaea33fdf941a91.pdf?index=true
    • https://c2d2da6d-5863-4e63-9f22-7428ca12099b.filesusr.com/ugd/daca0d_d4477dbd8a5447e2ae30556289c93856.pdf?index=true
    • https://7f5c6bc2-8cb0-4cca-890e-b8e8f54b5353.filesusr.com/ugd/ede58b_c4ea0b2bbfc243f7878275e6c4752695.pdf?index=true
    • https://baded9d6-d43a-42be-add8-c1cd2d81e057.filesusr.com/ugd/1c8c1e_2fcc7ce9e29d49d49f4f98b19fb24b74.pdf?index=true
    • https://3a2e7745-2564-4461-a71c-4ff52af94649.filesusr.com/ugd/8ade13_d824951faf314d269460c355e5ef2729.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0461/4488/0803/files/33782505112.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7639/files/wekevijebovelori.pdf
    • https://cdn.shopify.com/s/files/1/0435/0305/9110/files/73201222570.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/streaming_movies_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/44475717941.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7181/files/zivipuverudejosoxepara.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_off0000799a.bin
25e163550e01204a24632e0a0783fe3782d0f1a8a6e66c80dc3af781301b3aa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799A 4712 bytes
font_01_sfnt_off00008993.bin
1242194b7e8f9ce47d8b8b966288eb95295d6550b708ea480552c0b82031fde2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8993 10596 bytes

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