Malicious PDF — malware analysis report

Static analysis result for SHA-256 d804dd43efbb1020…

MALICIOUS

PDF

47.0 KB Created: 2020-09-16 18:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 188db500ce511e6e04f7f9775f33b985 SHA-1: 79e89007b418d3fe29f1bd2fcaa712ce13271afa SHA-256: d804dd43efbb10201812d400a8ac7f3b7f0f9ad38724afd6efd1d377c2f13584
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF was flagged as malicious by a machine learning classifier and contains numerous embedded links. Several of these links point to known malicious redirector infrastructure, such as 'ttraff.club', and a large number of other links are part of a link farm designed to appear as SEO-optimized content. The primary goal appears to be directing users to potentially harmful websites through a deceptive link farm.

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.club/wix?keyword=lost+saga+gear+wiki
    • http://soboro.indigochildskateboards.com/uploads/1/3/1/3/131398591/fd49010a956.pdf
    • http://jusib.mtmsmusic.com/uploads/1/3/1/3/131398452/witorokamu.pdf
    • http://files.rcdavis-tellinstories.com/uploads/1/3/1/3/131383624/ebc2656e5828c5.pdf
    • http://files.williamslakeskatingclub.com/uploads/1/3/2/6/132681343/mamukadanid.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/catcalling_definition.pdf
    • https://cdn.shopify.com/s/files/1/0440/7079/7462/files/deadpool_movie_download_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/calisthenicmovement_program.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/mass_tag_editor_tumblr.pdf
    • https://bdde5b30-613f-42ff-a4e4-65184758cca8.filesusr.com/ugd/a31856_5b2d6e71b1a44c88a3d0f15ae6dbaebd.pdf?index=true
    • https://47e8dd91-6b58-4be5-bf1f-e0e1b981c1e2.filesusr.com/ugd/95089d_df2f087e2516476284f5b037242d03c6.pdf?index=true
    • https://ef78ec8c-8275-47af-9a5d-bd9a59ea8425.filesusr.com/ugd/f08e01_26e02e46d7cb43e0a226deb19efa7275.pdf?index=true
    • https://6ac1c19d-a6c9-427f-a74b-d7af80211ca6.filesusr.com/ugd/067ecb_32902a938518492d8a5f5ce001a48094.pdf?index=true
    • https://32dad5d5-d0f3-4db0-8d09-203847dc3fd1.filesusr.com/ugd/682d1c_44c055d5481649879e40037c24cf6aee.pdf?index=true
    • https://ce989753-a5b0-4ed7-a2e3-165f8491e4f0.filesusr.com/ugd/e50c99_429efe9b232047018d6eb52f328e8580.pdf?index=true
    • https://ef531f62-0542-4381-b8f8-ee61637711f8.filesusr.com/ugd/3e87bf_cdb9eea0324a48449807cd6a521faeb7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e7a.bin
8f5b69ab482c49c348c8955a204bac243d7be243f56d68248444578fe1619951		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7A 3236 bytes
font_01_sfnt_off00007a07.bin
75dbecc2b4427609cbd96a3fea93c52d8b293453c80b82ca92bb356b5ba23fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A07 4920 bytes
font_02_sfnt_off00008af0.bin
5f4e1b868ae3276e137d28d64379ec6b8508e01908ff954509656f7d93f5d3cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF0 10452 bytes

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