Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92a899b08b230ad…

MALICIOUS

PDF

73.1 KB Created: 2020-08-14 18:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 275f5d41ecee5ac94710b4c661d94f4f SHA-1: a38a7ace211c3445e9e3ae88230ddaa325544df4 SHA-256: d92a899b08b230ade375b67f529b071bb0acdbc2a3121183bd775fc2e5c82268
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com' which is disguised as a SQL injection cheat sheet. This link is intended to lure the user into clicking it, likely leading to further malicious content or downloads. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a broad distribution effort. No scripts were extracted, but the primary malicious functionality appears to be the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=bypass+login+sql+injection+cheat+sheet
    • http://files.cityofbloomfield.info/uploads/1/3/0/9/130969469/e836a627.pdf
    • http://berobakoz.justinbendell.com/uploads/1/3/2/7/132740214/sulonimekula.pdf
    • http://files.sellwoodfurniture.com/uploads/1/3/2/6/132682685/334dbef85b90e8.pdf
    • http://tunaz.glasgowmtairport.com/uploads/1/3/1/3/131383483/5100595.pdf
    • http://files.kivahouse.net/uploads/1/3/0/7/130739835/8380936.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/tuwemobem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/burukarizamebafizajuset.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/24756202553.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/karang_gigi_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8975/files/analysis_of_biological_data_2nd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5939/6254/files/poxidukafugunirudog.pdf
    • https://cdn.shopify.com/s/files/1/0436/8583/9003/files/zelapusezevadarat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdf
    • https://cdn.shopify.com/s/files/1/0437/5196/4830/files/96740060948.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/tirajugepufeger.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/fezofobibatikiv.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0000c72d.bin
250868edb27db4ac8b4f52672e4497e377e5daac55800511ed843c0189fd9878		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC72D 25196 bytes
font_00_sfnt_off0000793d.bin
5f22b69e00eaa838135eda24ef6d47a80f468b34017bd6a001dbd15ce75fc4b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793D 5452 bytes
font_01_sfnt_off00008bd2.bin
a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD2 3720 bytes
font_02_sfnt_off0000972a.bin
bb966b7050c75a00cdfadaf9a808ee2b07adaaea896b081983f8a61b037c8189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x972A 2408 bytes
font_03_sfnt_off0000a1fd.bin
1e86d50c77cc81c2af0a83d37d1c44bc0169f8f2a83ce55090337b242fc1e27d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1FD 10864 bytes
font_05_sfnt_off0000f3af.bin
bbf524f044cefc276a9421371dc0f6c4f70774d8f6ad7def3acf5915aa8cf3d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 10560 bytes

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