Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55d67aa5bd5525c…

MALICIOUS

PDF

43.9 KB Created: 2020-07-29 05:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1053f792449061512133ecc44d849740 SHA-1: f1764cd8932faa121dec38dad4f1557ac68f5def SHA-256: e55d67aa5bd5525c46fbed522480ac8d4ea6cb88ece05e567a13f61e929fe4e9
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector pointing to 'ttraff.com'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute content or traffic to multiple sites. The document body, though heavily obfuscated, contains text related to 'Hepatitis b guideline' and 'wkhtmltopdf', indicating a lure to a potentially malicious resource.

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.com/pify?keyword=hepatitis+b+guideline
    • http://files.johnmrector.com/uploads/1/3/2/7/132710690/dojodepi.pdf
    • http://files.rippleinfra.com/uploads/1/3/2/6/132681513/450e3a1c4.pdf
    • http://files.ohsosweetoccasions.com/uploads/1/3/0/7/130738704/lixewaniba.pdf
    • http://files.schemmproductions.net/uploads/1/3/2/3/132302710/pimabifig.pdf
    • http://files.valleyhavencamp.com/uploads/1/3/1/3/131398219/kujoz_tevanikokenev.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/zapesave.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/foregovutoje.pdf
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/36767201323.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/todudibujafosanasi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2271/9912/files/fazagazoxase.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/tewisilenumasobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/45903579421.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/desagawudapomulowuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3777/files/33580462534.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/rujaguxirejuxorofijasij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5568/files/munesifumuku.pdf
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/kiwipesovunup.pdf
    • https://cdn.shopify.com/s/files/1/0438/3640/7973/files/8497583848.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/
    • https://cdn.shopify.com/s/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e56.bin
b075aaa218a10e67f63fa55a3a8fc1087178e03c06f56d1936e0e354b45dbccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E56 4904 bytes
font_01_sfnt_off00007f03.bin
f0a63058b92c24d0f8e37dcc6032866ddd24c4e5e8b9318d07b0e5d513ae8777		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F03 10328 bytes

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